Naohisa Kumagai: "Cobalt(III) Mixedーchelates with Tetradentate N,N′ーBis(1ーlーMenthyloxyー3ーbenzoylacetone)ethylenediimine and Bidentate Chelate.Controle of Chelate Conformation by Bidentata Ligand" Mem.Fac.Sci.,Kyushu Univ.,Ser.C,. 17(1). 69-72 (1989)

Naohisa Kumagai：“Cobalt(III) Mixed-chelates with Tetradentate N,N′-Bis(1-Menthyloxy-3-Benzylacetone)乙二亚胺和Bidentate Chelate.Controle of Chelate Conformation by Bidentata Ligand”九州大学Mem.Fac.Sci. .，C，17(1)。