1. Some simplified NP-complete graph problems;Garey;Theor. Comput. Sci.,1976
2. The rectilinear Steiner problem is NP-complete;Garey;SIAM J. Appl. Math.,1977
3. Computers and intractability;Garey,1979
4. The matroid matching problem;Lovász,1981
5. Bounds on feedback vertex sets of undirected cubic graphs;Speckenmeyer,1986