1. “The chromatic difference sequence of a graph”;Albertson;J. Combinatorial Theory B,1980
2. “The independence ratio and maximum degree of a graph”;Albertson;Congressus Numerantium,1976
3. M. Albertson and V. Booth, “Homomorphisms of symmetric graphs”, Congressus Numerantium (submitted).
4. “Homomorphisms of 3-chromatic graphs, II”;Albertson;Congressus Numerantium,1986
5. M. Albertson and L. Chan, “Independence and graph homomorphisms” (in preparation).