Topological Twin Graphs. Smallest Pair of Isospectral Polyhedral Graphs with Eight Vertices. - Haruo Hosoya; Umpei Nagashima; Sachiko Hyugaji (J. Chem. Inf. Comput. Sci., 1994)

An Experience with Super-Linear Speedup Achieved by Parallel Computing on a Workstation Cluster: Parallel Calculation of Density of States of Large Scale Cyclic Polyacenes. - Umpei Nagashima; Sachiko Hyugaji; Satoshi Sekiguchi; Mitsuhisa Sato; Haruo Hosoya (Parallel Comput., 1995)