AUVI - Schreuder,B.E.C.; de Jong,M.C.M.; Pekelder,J.J.; Vellema,P.; Bröker,A.J.M.; Betcke,H. - BSE risk assessment in the Netherlands: prevalence and incidence of scrapie - Transmissible Spongiform Encephalopathies. A Consultation on BSE with the Scientific Veterinary Committee of the Commission of the European Communities held in Brussels, September 14-15, 1993. Edited by R. Bradley and B. Marchant. European Commission, Agriculture, Document VI/4131/94-EN 1994, pp. 81-94
AKOO - Schreuder,B.E.C.; de Jong,M.C.M.; Pekelder,J.J.; Vellema,P.; Bröker,A.J.M.; Betcke,H. - Prevalence and incidence of scrapie in The Netherlands: a questionnaire survey. - The Veterinary Record 1993 Aug 28; 133(9): 211-4
ALYY - van Wuijckhuise,L.; Vellema,P.; Terbijhe,R.J. - [BSE: clinical diagnosis and field experience.] - BSE: klinische diagnostiek en veldervaringen. - Tijdschrift voor Diergeneeskunde 2001 Apr 15; 126(8): 279-81
AMBE - Visser,I.J.; Vermeulen,D.J.; Vellema,P.; Gruys,E. - Total CK and CK-BB activity in serum from sheep with scrapie - Veterinary Quarterly 1992 Dec; 14(4): 157-8