Speeding up random access machines by few processors
In: STACS 1986, Jg. 1986, S. 142-152
Time-processor trade-offs for universal parallel computers
In: Mathematical foundations of computer science. 1975 : trbské Pleso, Czechoslovakia, August 31 - September 4, 1981 (Lecture notes in computer science : 118), Jg. 1981, S. 433-441