Proceedings of the International Drug Discrimination Meeting held in Beerse, Belgium in 1998:
Meert T and Stolerman IP, Editors (1999) Drug Discrimination in Behavioural Neuroscience. Pharmacology Biochemistry and Behavior, Volume 64 (number 2 - Special Issue).

Proceedings of the International Drug Discrimination Meeting held in Noordwijkerhout, The Netherlands, in June 1990:
Glennon RA, Jarbe TUC and Frankenheim J, Editors (1991) Drug Discrimination: Applications to Drug Abuse Research. NIDA Monograph 116. US Government Printing Office, Washington DC.

Proceedings of the meeting Drugs as Interoceptive Stimuli held in North Falmouth, Massachusetts, in June 1988:
Emmet-Oglesby MW, Lal H, Bennett DA, Editors (1989) Drug Development Research Volume16 (numbers 2, 3 and 4 - Special Issue).

Proceedings of the International Drug Discrimination Meeting held in Beerse, Belgium in 1986:
Colpaert FC and Balster RL, Editors (1988) Transduction Mechanisms of Drug Stimuli. Springer-Verlag, Heidelberg.

Proceedings of the International Drug Discrimination Meeting held in in Beerse, Belgium 1982:
Colpaert FC and Slangen JL, Editors (1982) Drug Discrimination: Applications in CNS Pharmacology. Elsevier, Amsterdam.

Proceedings of the International Drug Discrimination Meeting held in Beerse, Belgium in 1978:
Colpaert FC and Rosecrans JA, Editors (1978) Stimulus Properties of Drugs: Ten Years of Progress. Elsevier- North Holland, Amsterdam.