Não informado. (1972). Hokkaido Mathematical Journal. Hokkaido University, Department of Mathematics.
Cita Chicago Style (17a ed.)Não informado. Hokkaido Mathematical Journal. Sapporo, Japão: Hokkaido University, Department of Mathematics, 1972.
Cita MLA (8a ed.)Não informado. Hokkaido Mathematical Journal. Hokkaido University, Department of Mathematics, 1972.
Precaución: Estas citas no son 100% exactas.