Não informado. (2020). Journal of the Faculty of Science, Hokkaido Imperial University. Hokkaido University, Department of Mathematics.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Journal of the Faculty of Science, Hokkaido Imperial University. Sapporo, Japão: Hokkaido University, Department of Mathematics, 2020.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Journal of the Faculty of Science, Hokkaido Imperial University. Hokkaido University, Department of Mathematics, 2020.
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