1983  “The four pīṭhas: a report of research, spring 1983.” In: Hans Bakker and Alan Entwistle (eds), Devī : the worship of the goddess and its contribution to Indian pelgrimage: a report on a seminar and excursion, Groningen: Institute of Indian studies, State University of Groningen, 47-69.
1984  “On the teaching of Āyurveda.” In: G.J. Meulenbeld (ed.), Proceedings of the international workshop on priorities in the study of Indian medicine, Groningen, pp. 273-276.
– “An English translation of Suśrutasaṃhitā, Nidānasthāna 1.1-39 together with Gayadasa’s Nyāyacandrika.” In: G.J. Meulenbeld (ed.), Proceedings of the international workshop on priorities in the study of Indian medicine, Groningen, pp. 277-310.
1986  Kuṣṭha: an annotated translation of Bhelasaṃhitā Nidāna 5 and Cikitsā 6 with a general introduction on the Bhelasaṃhitā, Groningen.
1989  [Red.] of: P. van Andel et al., Koning Sivi en doctor Silva: bijdragen uit boeddhologie en oftalmologie, Groningen.
1995  Agastyasaṃhitā 1-23, introd., critical ed. and annotated transl., 2 vols, Groningen. – PhD thesis Groningen University.