Topological Index. A Newly Proposed Quantity Characterizing the Topological Nature of Structural Isomers of Saturated Hydrocarbons, Bulletin of the Chemical Society of Japan, Vol.44 (1971), No.9, pp.2332-2339. doi:10.1246/bcsj.44.2332
On the Distance Matrix of a Directed Graph, Jour. Graph Theory 1 (1977)(ロナルド・グラハムとアラン・ホフマン(en)との共著)[10]
On the matching properties of three fence graphs, Journal of Mathematical Chemistry (1993) Volume 12, Issue 1, pp.211-218(フランク・ハラリーとの共著)[11]