1. Disjoint paths in a rectilinear grid;Frank;Combinatorica,1982
2. Maximum flow in (s, t) planar networks;Hassin;Inform. Process. Lett.,1981
3. The NP-completeness column: An outgoing guide;Johnson;J. Algorithms,1982
4. On Dual Integrality, Min-Max Equalities, and Algorithms in Combinatorial Linear Programs;Korach;Ph.D. thesis,1982
5. Routing through a rectangle, report;Mehlhorn,1983