@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/