Zbigniew Lonc. On Complexity of Some Chain and Antichain Partition Problems. In Gunther Schmidt, Rudolf Berghammer, editors, 17th International Workshop, WG 91, Fischbachau, Germany, June 17-19, 1991, Proceedings. Volume 570 of Lecture Notes in Computer Science, pages 97-104, Springer, 1991.
Abstract is missing.