@article{10_4153_CJM_1973_057_9,
     author = {Moore, J. Douglas and Hewett, Edwin J.},
     title = {Abelian {Groups} in {Which} {Every} {\ensuremath{\alpha}-Pure} {Subgroup} is {\ensuremath{\beta}-Pure}},
     journal = {Canadian journal of mathematics},
     pages = {560--566},
     year = {1973},
     volume = {25},
     number = {3},
     doi = {10.4153/CJM-1973-057-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1973-057-9/}
}