G. Chartrand,International Conference on the Theory and Applications of Graphs.International Conference on the Theory and Applicationsl of Graphs(4th : 1980 : Western Michigan University)：The theory and applications of graphs, proceedings.Wiley,1981.
International Conference on the Theory and Applicationsl of Graphs(4th : 1980 : Western Michigan University)：The theory and applications of graphs, proceedings
G. Chartrand,International Conference on the Theory and Applications of Graphs.Wiley,1981.
