Proceedings of the Logic Colloquium. Held in Aachen, July 18-23, 1983: Part 2: Computation and Proof Theory Lecture Notes in Mathematics, nr. 1104 Editat de M. M. Richter et al. dec 1984 Paperback Preț: 413.63 lei 6-8 săpt.
Logic and Machines: Decision Problems and Complexity: Proceedings of the Symposium “Rekursive Kombinatorik” held from May 23–28, 1983 at the Institut für Mathematische Logik und Grundlagenforschung der Universität Münster/Westfalen Lecture Notes in Computer Science, nr. 171 Editat de E. Börger et al. mai 1984 Paperback Preț: 354.41 lei 6-8 săpt.