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@article{MAN_1964__153_161115, author = {R.A. BEAUMONT and R.S. PIERCE}, title = {Isomorphic {Direct} {Summands} of {Abelian} {Groups.}}, journal = {Mathematische Annalen}, pages = {21--37}, publisher = {mathdoc}, volume = {153}, year = {1964}, zbl = {0122.27801}, url = {http://geodesic.mathdoc.fr/item/MAN_1964__153_161115/} }
R.A. BEAUMONT; R.S. PIERCE. Isomorphic Direct Summands of Abelian Groups.. Mathematische Annalen, Tome 153 (1964), pp. 21-37. http://geodesic.mathdoc.fr/item/MAN_1964__153_161115/