1. Graph Theory with Applications;Bondy,1976
2. Niche graphs;Cable;Discrete Appl. Math.,1989
3. Interval Graphs and Food Webs: A Finding and a Problem;Cohen;RAND Corporation Document 17696-PR,1968
4. A characterization of competition graphs;Dutton;Discrete Appl. Math.,1983
5. Niche numbers;Fishburn;J. Graph Theory,1992