Não informado. (1972). Hokkaido Mathematical Journal. Hokkaido University, Department of Mathematics.
Citace podle Chicago (17th ed.)Não informado. Hokkaido Mathematical Journal. Sapporo, Japão: Hokkaido University, Department of Mathematics, 1972.
Citace podle MLA (8th ed.)Não informado. Hokkaido Mathematical Journal. Hokkaido University, Department of Mathematics, 1972.
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