Walter J. Savitch. Parallel and Nondeterministic Time Complexity Classes (Preliminary Report). In Giorgio Ausiello, Corrado Böhm, editors, Automata, Languages and Programming, Fifth Colloquium, Udine, Italy, July 17-21, 1978, Proceedings. Volume 62 of Lecture Notes in Computer Science, pages 411-424, Springer, 1978.
Abstract is missing.