1. Which graphs have unique distance trees?;Chartrand;Amer. Math. Monthly,1974
2. Geometric graphs;Chartrand;Springer Lecture Notes Math. No. 186,1971
3. Graph Theory;Harary,1969
4. Harary, F., Achievement and avoidance games. To appear.
5. Convexity in graphs;Harary;J. Differential Geometry,1981