Turnhout, E., & Halffman, W. (2011, forthcoming). Boundary work and environmental expertise. In W. Tuinstra (Ed.), Course Book Environmental Problems: Crossing Boundaries Between Science Heerlen: Open Universiteit.

Halffman, Willem, and Loet Leydesdorff  (2010), "Is Inequality Among Universities Increasing? Gini Coefficients and the Elusive Rise of Elite Universities", Minerva, 48(1), 55-72. DOI:10.1007/s11024-010-9141-3
(Special issue on universities).

Halffman, W. (2009). Book Review: Democratizing technology: risk, responsibility and the regulation of chemicals, by Anne Chapman, London, Earthscan, 2007. Journal of Risk Research, 12(7-8), 1035-1037.

Halffman, W., De Vries, A., & Hoppe, R. (2008). Samen onzekerheid doenbaar maken: aanbevelingen voor verbeterde omgang met onzekerheden bij het Planbureau voor de Leefomgeving. Enschede: Universiteit Twente.

Halffman, Willem (in preparation),  'Avocational science: amateurs and the naturalist tradition', paper presented at the Science and Democracy Network meeting, Cambridge, June 2007.

Halffman, Willem (in preparation), 'From Bargaining to Deliberation (and back again)? The Dutch spatial planning bureau.'

Halffman, Willem and Roland Bal (in preparation), 'After Impact: the evaluation of science advice to public policy',

Halffman, Willem (2006) 'If agency is the answer, kindly repeat the question. Essay Review of Harbers et al., Inside the Politics of Technology', Science and Public Policy 33/6 (July): 469-72.

Halffman, Willem (2005) 'Science/Policy Boundaries: National Styles?' Science and Public Policy 32/6: 457-67.

Halffman, Willem and Rob Hoppe (2005) 'Science/policy boundaries: a changing division of labour in Dutch expert policy advice.' in Sabine Maasen and Peter Weingart (eds), Democratization of expertise? Exploring novel forms of scientific advice in political decision-making (Dordrecht: Kluwer): 135-52.

Hoppe, Rob and Willem Halffman (2005) 'Dilemma of valse tegenstelling : het risico van simpele dichotomieën in het toezicht op riskante technische systemen', Beleidswetenschap 19/3: 52-63.

Hoppe, Rob and Halffman, Willem (2004) 'Wetenschappelijke beleidsadvisering in Nederland. Trends en ontwikkelingen', Beleidswetenschap 18/1: 31-61.

Willem Halffman,  Boundaries of Regulatory Science: Eco/toxicology and the regulation of aquatic hazards of chemicals in the US, England, and the Netherlands, 1970-1995, dissertation, University of Amsterdam, 2003, cum laude. (pdf synopsis)

Arco Timmermans, Rob Hoppe, Willem Halffman,  “Kamer laat steken vallen bij onderzoek” in: Trouw, Donderdag 9 oktober 2003, p. 19.

Willem Halffman, “Boundaries of Regulatory Science: Eco/toxicology and the regulation of aquatic hazards of chemicals in the US, England, and the Netherlands, 1970-1995”, EASST Review, Vol. 22 (2/3), November 2003, pp. 14-17.

Willem Halffman, 'De paradox van de wetenschapsonderzoeker' (review), Krisis, 2003, 2: 103-106.

Willem Halffman, 'What Science? Which Democracy?'. Paper presented at Paper for the Workshop "Science and Democracy, JF Kennedy School of Government, Harvard, July 2003.

Willem Halffman and Rob Hoppe, Rethinking Political Judgement and Science-based expertise: Research protocol, Rethinking project paper, 2003.

Willem Halffman and Rob Hoppe, Onzekerheid in wetenschappelijke beleidsadvisering en besluitvorming: literatuurscan, report for RIVM/MNP, 2003.

Willem Halffman and Rob Hoppe, 'Science/policy boundaries: a changing division of labour in Dutch expert policy advice'. Paper presented at Sociology of the Sciences Yearbook conference, Basel, December 2003.

Chunglin Kwa, Willem Halffman, Leen Dresen, Frank Wamelink, Ankerpunten van het Klimaatonderzoek: Het Nationaal Onderzoek Programma Mondiale Luchtverontreiniging en Klimaatverandering en Verankering van het klimaatonderzoek in Nederland, RIVM, Bilthoven, 1999, report no. 410 200 034.

Roland Bal and Willem Halffman, The Politics of Chemical Risk: Possible Regulatory Futures Proceedings of a Workshop held in Amsterdam, December 1998, Kluwer Academic Publishers.

Willem Halffman and Roland Bal, “The Politics of Chemical Risk: Possible Regulatory Futures” in: Easst Review, 1996, jg.15, nr.1, p.18-23.

André van Raalte en Willem Halffman, De registratieplicht gevaarlijke stoffen geëvalueerd. [The obligation to register hazardous substances evaluated.] Ministerie van Sociale Zaken en Werkgelegenheid, VUGA, Den Haag, september 1996, ISBN 90 5250 346 X.

Willem Halffman, “Technology Versus Democracy? The Failure of Constructivist Recipes for the Dilemmas of Environmental Determinism.” Paper presented at the 4S/EASST conference `Signatures of Knowledge Societies, Bielefeld, Germany, October 1996.

Willem Halffman, “Nieuwe militaire technologie: vele doelen voorbij” (editoriaal en redactie van thema-nummer over militaire technologie) in: Zeno, nr. 2, 1995, p. 19.

 Willem Halffman, “Het consensusmodel als valstrik” in: Zeno, nr. 4, 1995, p. 9.

 Willem Halffman, “Een onbespoten college?” in: Zeno, nr. 5, 1995, p. 3.

Willem Halffman, “The Boundary Between Ecology and Toxicology: an Outsider's Perspective.” in: John Cairns Jr. en Barbara Niederlehner (eds.), Ecological Toxicity Testing: Scale, Complexity, and Relevance. Lewis:Boca Raton, 1994.

Willem Halffman, “Milieugevaarlijke stoffen door een wetenschapsdynamische bril” in: Papyrus, 1994.

Willem Halffman, “Els Witte: een kritische onafhankelijke” in: Zeno, nr. 6, 1994, p. 38-9.

Willem Halffman, “Politieke beslissingen en experts.” Review of: Anthony Barker en B. Guy Peters (eds.), The Politics of Expert Advice: Creating, Using and Manipulating Scientific Knowledge for Public Policy, Edinburgh University Press, 1993, in: Zeno, nr. 3, 1994, p. 39.

Willem Halffman,  “Zal de electronische snelweg 's nachts ook onverlicht zijn?” in: Zeno, nr. 3, 1994, p. 35.

Willem Halffman and Roland Bal, “Verkiezingen en technologie.” in: Zeno, nr. 2, 1994, p. 3.

Willem Halffman and Roland Bal, “Technologie is overal, maar niet in de verkiezingen.” in: Zeno, nr. 2, 1994, p. 10-14.

Willem Halffman, “Non-sociologie van de non-sociologie?” Review of: Rein De Wilde, Discipline en legende. De identiteit van de sociologie in Duitsland en de Verenigde Staten, 1870-1930, in: Kennis en Methode, jg. 17, nr. 3, 1993, p. 315-319.

Willem Halffman, “The Standardization of Chemical Risk: Boundaries Between Ecology, Toxicology, and US Regulatory Practice.” Paper for the Society for Social Studies of Science Annual Conference, Purdue University, Indiana, 19-21 november 1993.

Willem Halffman, “De marginale Professie” Review of: Sjaak Koenis, Tussen marge en professie: Frankfurt en Chicago: twee visies op de praktische rol van sociologen. Proefschrift, van Gennep, Serie Kennis en Openbare Mening, Amsterdam 1991, in: Krisis, jg. 12, nr. 46, maart 1992, p. 78-82.

Willem Halffman, “Aspects of the Boundary Between Ecology and Toxicology” Paper for theJoint Conference of the Society for Social Studies of Science and the European Association for Science Studies, Gotenburg, Zweden, Augustus 1992.

Frank Wamelink and Willem Halffman, “a498wim@HASARA11-&-a498frnk@HASARA11 Science and Technology Studies: The Graduate Perspective. A Postmodern Adventure.” in: EASST Newsletter, jg. 10, nr. 1/2, 1991, p. 11-27.