[1] BONCHEV D., GUTMAN L., POLANSKY O. E.: Parity of the distance numbers and Wiener numbers of bipartite graphs. Math. Chem. 22 (1987), 209-214. MR 0921411 | Zbl 0626.05032

[2] BUCKLEY F., HARARY F.: Distance in Graphs. Addison-Wesley, Redwood, 1990. Zbl 0688.05017

[3] ENTRINGER R. C., JACKSON D. E., SNYDER D. A.: Distance in graphs. Czechoslovak. Math. J. 26 (1976), 283-296. MR 0543771 | Zbl 0329.05112

[4] GUTMAN I.: On distance in some bipartite graphs. Publ. Inst. Math. (Beograd) (N.S.) 43 (1988), 3-8. MR 0962249

[5] GUTMAN I., POLANSKY O. E.: Mathematical Concepts in Organic Chemistry. Springer-Verlag, Berlin, 1986. MR 0861119 | Zbl 0657.92024

[6] GUTMAN I., YEH Y. N., CHEN J. C.: On the sum of all distances in graphs. Tamkang J. Math. 25 (1994), 83-86. MR 1277623 | Zbl 0808.05048

[7] PLESNÍK J.: On the sum of all distances in a graph or digraph. J. Graph Theory 8 (1984), 1-21. MR 0732013 | Zbl 0552.05048

[8] ŠOLTÉS E.: Transmission in graphs: A bound and vertex removing. Math. Slovaca 41 (1991), 11-16. MR 1094978 | Zbl 0765.05097

[9] WIENER H.: Structural determination of paraffin boiling points. J. Amer. Chem. Soc. 69 (1947), 17-20.