Schalk, P.H. (1998). Management of marine natural resources through by biodiversity informatics. Mar. Policy 22(3): 269-280. dx.doi.org/10.1016/S0308-597X(98)00013-X
Van Weering, T.C.E.; Helder, W.; Schalk, P. (1997). The Netherlands Indian Ocean expedition 1992–1993, first results and an introduction. Deep-Sea Res., Part II, Top. Stud. Oceanogr. 44(6-7): 1177–1193. http://dx.doi.org/10.1016/S0967-0645(97)00029-5
Van Soest, R.W.M.; Schalk, P.H.; Smith, K.; Picton, B.E.; Brugman, M.; Díaz, M.C.; Sanders, M.L.; de Weerdt, W.H.; Rützler, K. (1996). Por-Linnaeus: the application of interactive multimedia software for species data storage and computer assisted identification of Porifera. Bull. Kon. Belg. Inst. Natuurwet. Biologie 66(Suppl.): 63-72
Schalk, P.H.; Witte, J. IJ.; Budihardjo, S.; Hatta, A.M. (1990). Monsoon influences on micronekton of the Banda Sea (Indonesia). Neth. J. Sea Res. 25(4): 601-610
Schalk, P.H.; Zijlstra, J.J.; Witte, J. IJ. (1990). Spatial and seasonal differences in acoustic recordings of the Banda Sea (Indonesia), obtained with a 30 kHz echosounder. Neth. J. Sea Res. 25(4): 611-620
Soewito; Schalk, P.H. (1990). Spatial and seasonal patterns in fish larvae distribution in the Banda sea (Indonesia). Neth. J. Sea Res. 25(4): 591-600
Schalk, P. (2002). Biodiversity informatics: sharing knowledge, in: Goethals, P. et al.Ecological informatics applications in water management conference, Gent (Belgium), 6-7 November 2002: Abstract book. pp. 11
Sluys, R.; Schalk, P.H.; Schram, F.R. (1995). Systematic cirripedeology in the 21st century: multimedia biodiversity information systems, in: Schram, F.R. et al. (Ed.) New frontiers in barnacle evolution. Crustacean Issues, 10: pp. 43-48
Schalk, P. (2002). The colour of biodiversity data, in: Brown, M. et al.The Colour of Ocean Data: International Symposium on oceanographic data and information management, with special attention to biological data. Brussels, Belgium, 25-27 November 2002: book of abstracts. VLIZ Special Publication, 11: pp. 45
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