1. Graph Theory with Applications;Bondy,1976
2. Embedding partial Steiner triple systems in NP-complete;Colbourn;J. Combin. Theory (A),1983
3. Latin Squares and their Applications;Denes,1976
4. On completing partial Latin squares;Giles;Proc. Eighth Southeastern Conf. Combinatories, Graph Theory, and Computing,1977
5. Distinct representatives of subsets;Hall;Bull. Amer. Math. Soc.,1948