A Characterization of Oriented Matroids in Terms of Topes. - Keiichi Handa (Eur. J. Comb., 1990)

Antipodal graphs and oriented matroids. - Komei Fukuda; Keiichi Handa (Discret. Math., 1993)

Bipartitie Graphs with Balanced (a, b)-Partitions. - Keiichi Handa (Ars Comb., 1999)

An Optimization Method for Investment and Maintenance Planning of Power Plants under Uncertain Environments. - Keiichi Handa; Shigeru Matsumoto; Masashi Nakamoto; Naoshi Uchihira (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2005)

Stochastic simulation optimization benchmarking method in consideration of finite period of service. - Takufumi Yoshida; Daisuke Yamaguchi; Keiichi Handa (GECCO Companion, 2020)