1. Miscellaneous properties of equi-eccentric graphs;Akiyama;Ann. Discrete Math.,1983
2. The number of furthest neighbour pairs of a finite planar set;Avis;Amer. Math. Monthly,1984
3. Graphs and Digraphs;Behzad,1979
4. Self-centered graphs with given radius;Buckley,1979
5. Graph Theory;Harary,1969