B. Baumslag
Daniel Gorenstein
Jonathan Leech
Frank Calegari
John R. Ferraro
Arcata Conference on Representations of Finite Groups (1986 Humboldt State University)
J. D. Dixon
Constandinos X. Mavromoustakis
Simon Riche
Summer Research Institute on Algebraic Groups and Their Generalizations (1991 Pennsylvania State University)
Bernard Maskit
Lynne M. Butler
Wilfried Grossmann
David Mark; Jeff LaMarche
Klaus D. Niemann
Antonio Teti
Meinard Müller
Alejandro Vaisman
Lech W. Zacher
International Colloquium on Group Theoretical Methods in Physics Cocoyoc, Mexico 1980.