Characterization of the linear weighted sum decision principle. - Yasuhiko Takahara; Bumpei Nakano; Kyoichi Kijima (Inf. Sci., 1979)

Frankl's Conjecture is True for Modular Lattices. - Tetsuya Abe; Bumpei Nakano (Graphs Comb., 1998)

Lower Semimodular Types of Lattices: Frankl's Conjecture Holds for Lower Quasi-Semimodular Lattices. - Tetsuya Abe; Bumpei Nakano (Graphs Comb., 2000)