Triple Brackets and Lax Morphism Categories. - Keith A. Hardie; Klaus Heiner Kamps; Howard J. Marcum; Nobuyuki Oda (Appl. Categorical Struct., 2004)

Minimal closed sets and maximal closed sets. - Fumie Nakaoka; Nobuyuki Oda (Int. J. Math. Math. Sci., 2006)

Long Box Bracket Operations in Homotopy Theory. - Howard J. Marcum; Nobuyuki Oda (Appl. Categorical Struct., 2011)