@article{10_4153_CJM_1973_107_x,
     author = {Cheatham, Thomas},
     title = {Direct {Sums} of {Torsion-Free} {Covers}},
     journal = {Canadian journal of mathematics},
     pages = {1002--1005},
     year = {1973},
     volume = {25},
     number = {5},
     doi = {10.4153/CJM-1973-107-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1973-107-x/}
}