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Realization of numbers as the degrees of maps between manifolds

Acta. Math. Sin. (Engl. Ser.) 26 (2010), no.8, 1413-1424


sums of distinct integral squares in $\mathbb{Q}(\sqrt{2})$, $\mathbb{Q}(\sqrt{3})$ AND $\mathbb{Q}(\sqrt{6})$
Bull. Aust. Math. Soc.