Ottens, J.J. 2013. Conservation Science in Context – Review of strategic reviews relating to conservation science, report to ICCROM forum on Conservation Science (33pp), October 2013.

Ottens, J.J. 2013. Abstract on assessing needs and developing strategies in different contexts - a summary of strategic reviews, ICCROM Forum 2013 on Conservation science 16-18 October, Rome.

Ottens, J.J., Maarschalkerweerd, S., Tennant, N., Van Langh, R., 2012. Het Ateliergebouw: centre of excellence. Gezamenlijke notitie voor directies en besturen van Rijksdienst voor het Cultureel Erfgoed, de Universiteit van Amsterdam, faculteit der Geesteswetenschappen en het Rijksmuseum Amsterdam, 10pp.

Ottens, J.J. 2012. Centre of excellence – kunst technologisch & conserveringsonderzoek aan cultureel erfgoed. Interne discussie notitie voor bespreking met mogelijke coöperatie partners.

Van ‘t Hof, J; Van de Ven, H. en Ottens, J.J., 2013. Cultural heritage and sustainability: innovation, lessons learnt and behavior, Abstract for sb 13 Munich- Implementing Sustainability– Barriers and Chances, April 2013.

Ottens, J.J., 2011. Het museum als duurzaam bedrijf. Hoofdstuk in boek:  Duurzaam erfgoed. Duurzaamheid, energiebesparing en monumenten. Van de Ven, H. (ed.). Uitgegeven door Rijksdienst voor het Cultureel Erfgoed en Uitgeverij Terra Lannoo.

Ottens, J.J., 2011. Voorwoord in “Inside Installations: Theory and Practice in the Care of Complex Artworks”, Scholte, T. and Wharton, G. (eds.), Amsterdam University Press, Amsterdam.

Ottens, J.J. en van ‘t Veen, C.,2011. Voorwoord in PUR facts, Van Oosten, T.B., Amsterdam University Press,  Amsterdam.

Ottens, J.J. ,2009. De onderzoeksagenda en collectiemanagement, ICN-Nieuwsbrief, oktober 2009

Ottens, J.J., 2013. From Earth sciences to Science4Arts. Abstract in Programbook. Earth Science career event, Amsterdam.

Ottens, J., Schrap, M. en Buscher, C., 2008. Kennisaudit Rivieren. Kennisaudit toegepast op drie Waterdienst projecten binnen het thema Rivieren. 47 pp., Uitgave 059, Rijkswaterstaat Waterdienst.

Ottens, J.J. en Breukel, R.M.A., 2007. Optimalisatie van de landelijke taak meetnetten en informatiesytemen van het Hoofd Watersysteem. Interne RWS notitie.

Ottens, J.J., 2006. The role of ECMWF products in the optimisation of operational processes at KNMI. Abstract International User meeting – European Centre for Medium Range Weather Forecasts, Reading, UK.

Ottens, J.J., 2004 . Waarom innovatie niet bestaat… - Vernieuwingsprogramma en innovatie bij de Weerdienst., 3pp. Weergave, KNMI-tijdschrift.

Ottens, J.J., 2002. Weather forecasting, model monitoring or the third way? Meteorologica, 11, no. 4.

Ottens, J.J. en Blaauboer, D., 2002. Weerdienst 2006. Innovatie programma voor de KNMI Weerdienst operatie op basis van de nieuwste inzichten op het gebied van weermodellen en waarneemsystemen. Interne uitgave KNMI, De Bilt.

Ottens, J.J. 2001. Weerdienst Futureproof. Centralisatie en optimalisatie van de Weerdienst operatie. Interne uitgave KNMI, De Bilt.

Ottens, J.J. and Arnold, G., 2000. Guidelines on monitoring and assessment of transboundary groundwaters, 64 pp. . UN/ECE Task Force on monitoring and Assessment. ECE Water Series.

Timmerman, J.G., Ottens, J.J. and Ward, R.C., 1999. The information cycle as a framework for defining information goals for water quality monitoring, Environmental Management, vol 24, 3.

Ottens, J.J., 1998. Information Strategies in Water Management  and the use of indicators. Abstracts and Programme Conference Bridging the Gap  - new needs and perspectives for environmental information, London.

Ottens, J.J., Claessen, F.A.M., Stoks, P.G., Timmerman, J.G., Ward, R.C., 1997. Editors of the Proceedings of the international workshop Monitoring Tailor-made II, Nunspeet, The Netherlands.

Ottens, J.J., Timmerman, J.G., Grift, B. van der, and Sprenger, T., 1997. Prospects for the use of indicators in water management. In: Proceedings of the international conference “Management of transboundary waters in Europe”, Mrzezyno, Poland.

Ottens, J.J. and Timmerman, J.G., 1997. The information cycle – a framework for the management of our water resources. Proceedings of the Stockholm Water symposium.

Van Luin, A.B. and Ottens, J.J., 1997. Conclusions and Recommendations of the International Workshop “Monitoring Tailor-made II”- Information Strategies in Water Management. European Water Pollution Control (EWPCA),  7, no 4, Elsevier.

Timmerman, J.G., Adriaanse, M. Breukel, R.M.A., Oirschot, M.C.M. and Ottens, J.J., 1997. Guidelines for water quality monitoring and assessment of transboundary rivers. European Water Pollution Control, (EWPCA),  7, no 4, Elsevier.

Ottens, J.J., Breukel, R.M.A., 1997. Water quality monitoring,: Strategies and pitfalls I and Future monitoring II, Reader for IHE-students, Delft.

Adriaanse, M., Timmerman, J,  Ottens, J.J., Oirschot, M.C.M., Breukel,  R.M.A., van der Guchte, C., Mulder, W.H.,  1996. Guidelines on Water-quality monitoring and assessment of Transboundary rivers. UN/ECE Task Force on monitoring and Assessment. ECE Water Series.

Ottens, J.J., Van Kreveld, S.A., Knappertsbusch, M., Ganssen, G.M., Van Hinte, J.E., 1994. Accumulation of biogenic carbonate and ice-rafted debris (Heinrich layers) in deep sea sediments from the Northeast Atlantic. NAC II: “Het Systeem Aarde”, - AWON conference proceedings, Veldhoven.

Ottens, J.J., 1993. Spatial dynamics of planktic foraminifera in the Northeastern Atlantic. Marine Micropaleontology, 24, 103-114.

Ottens, J.J., 1994. The efficiency of plankton pumps in sampling foraminiferal  faunas. Deep-Sea Research,  65, 221-224.

Ottens, J.J. en van Kreveld, S.A., 1993. Kalkplankton als monitor van een natuurlijk CO2 experiment tijdens de laatste glaciale-interglaciale cyclus. Rapport voor RIVM/NOP I, 17 pp.

Ottens, J.J., 1992. Neogloquadrinids and the Northeast Atlantic Chlorophyll Maximum. NAC  I – “Modelleren en Waarnemen”, - AWON conference proceedings, Veldhoven.

Van Kreveld, S.A., Ottens, J.J. and Knappertsbusch, M., 1992. Carbonate production record in the North Atlantic Deep Sea Core T88-9P. Program and abstracts, GEM III, Blagnac, France.

Ottens, J.J. and  Nederbragt, A.J., 1992. Planktic foraminiferal diversity as indicator of ocean environments.  Marine Micropaleontology, 19, 13-28

Ottens, J.J., 1992. North Atlantic Planktic foraminifera as indicators of ocean environments. FEBO-druk, Enschede, 200pp.

Ottens, J.J., 1992. April and August Northeastern Atlantic surface water masses reflected in planktic foraminifera. Neth. Journal of Sea Res., 28, 4, 261-283.

Ottens, J.J. 1991. Planktic foraminifers  as North Atlantic Watermass Indicators; Oceanologica Acta, 14, 2, 123-140.

Ottens, J.J. and Nederbragt, A.J., 1990. Species diversity of planktic foraminiferal faunas as indicator of (paleo)ocenic conditions, such as frontal zones, upwelling and mixing of waters. Abstracts of the IXth meeting of the Regional Committee on Mediterranean Neogene Stratigraphy, Barcelona, p 261.

Ottens, J.J., 1990. Diversity and equitability of planktic foraminiferal faunas in surface waters realted to sediments and global diversity trends. Abstracts with Program of the annual meeting of the Geological Society of America (GSA), Dallas, U.S., vol 22, 7, 199.

Ottens, J.J., 1990.Planktic foraminiferal information indices. Program with abstracts, International workshop “Global Emiliania Modelling Initiative”(GEM I), p14, Blagnac, France.

Ottens, J.J., 1989. Seasonal and other hydrographical imprints on fluxes in North Atlantic planktic foraminiferal sediments, abstracts of the 3rd International  Conference on Paleoceanography (ICP III), Cambridge, UK, Terra Abstracts, 1 (2).

Ottens, J.J., 1989. Planktic foraminifera as water mass indicators. AWON-conference “Global Change and Stasis in the Geological Past”, Abstract. NIOZ, Texel.

Ottens, J.J., 1987. Modern planktonic foraminifera and their use as water mass indicators in the North Atlantic Ocean. Abstract, Workshop “Biochemical Fluxes in the Ocean”, KNAW, Amsterdam.