Template:Olum1953
From Manifold Atlas
P. Olum, Mappings of manifolds and the notion of degree, Ann. of Math. (2) 58 (1953), 458–480. MR0058212 (15,338a) Zbl 0052.19901
P. Olum, Mappings of manifolds and the notion of degree, Ann. of Math. (2) 58 (1953), 458–480. MR0058212 (15,338a) Zbl 0052.19901