Mathematical logic /
edited by Petio Petrov Petkov.
APA Citation
Summer School and Conference on Mathematical Logic (1988 : Chaĭka, V. okrŭg., Heyting, A. (Arend)., Petkov, P. Petrov. (1990). Mathematical logic. New York: Plenum Press.
MLA Citation
Summer School and Conference on Mathematical Logic (1988 : Chaĭka, Varnenski okrŭg, Bulgaria), A. (Arend) Heyting, and Petio Petrov Petkov. Mathematical Logic. New York: Plenum Press, 1990.
Warning: These citations may not always be complete (especially for serials).