@article{1102911630,
author = {Swenson, Carl},
title = {Direct sum subset decompositions of $Z$.},
journal = {Pacific J. Math.},
volume = {55},
number = {2},
year = {1974},
pages = { 629-633},
language = {en},
url = {http://dml.mathdoc.fr/item/1102911630}
}
Swenson, Carl. Direct sum subset decompositions of $Z$.. Pacific J. Math., Tome 55 (1974) no. 2, pp. 629-633. http://gdmltest.u-ga.fr/item/1102911630/