@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/}
}