1. Graph isomorphism;Corneil,1970
2. Graph Theory;Harary,1969
3. An n log n algorithm for isomorphism of planar triply connected graphs;Hopcroft,1970
4. An n log n algorithm for minimizing states in a finite automation;Hopcroft,1970
5. J. Hopcroft and R. Tarjan, Efficient algorithms for graph manipulation, in preparation.