Não informado. (1972). Hokkaido Mathematical Journal. Hokkaido University, Department of Mathematics.
Chicago-Zitierstil (17. Ausg.)Não informado. Hokkaido Mathematical Journal. Sapporo, Japão: Hokkaido University, Department of Mathematics, 1972.
MLA-Zitierstil (8. Ausg.)Não informado. Hokkaido Mathematical Journal. Hokkaido University, Department of Mathematics, 1972.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.