Gunter Bär A Special Problem on Rectangular Floorplans Solvable in Polynomial Time. [Citation Graph (0, 0)][DBLP] Elektronische Informationsverarbeitung und Kybernetik, 1991, v:27, n:5/6, pp:283-288 [Journal]
Martin Sonntag Hamiltonicity and Traceability of the Lexicographic Product of Hypergraphs. [Citation Graph (0, 0)][DBLP] Elektronische Informationsverarbeitung und Kybernetik, 1991, v:27, n:5/6, pp:289-301 [Journal]
Viliam Geffert How to Generate Languages Using Only Two Pairs of Parentheses. [Citation Graph (0, 0)][DBLP] Elektronische Informationsverarbeitung und Kybernetik, 1991, v:27, n:5/6, pp:303-315 [Journal]