Não informado. (1972). Hokkaido Mathematical Journal. Hokkaido University, Department of Mathematics.
Chicagoスタイル(17版)引用形式Não informado. Hokkaido Mathematical Journal. Sapporo, Japão: Hokkaido University, Department of Mathematics, 1972.
MLA(8版)引用形式Não informado. Hokkaido Mathematical Journal. Hokkaido University, Department of Mathematics, 1972.
警告: この引用は必ずしも正確ではありません.