Stephan Waack. The Parallel Complexity of Some Constructions in Combinatorial Group Theory (Abstract). In Branislav Rovan, editor, Mathematical Foundations of Computer Science 1990, MFCS 90, Banská Bystrica, Czechoslovakia, August 27-31, 1990, Proceedings. Volume 452 of Lecture Notes in Computer Science, pages 492-498, Springer, 1990.
Abstract is missing.