@article{1102806145, author = {Schultz, Phillip}, title = {The typeset and cotypeset of a rank $2$ abelian group.}, journal = {Pacific J. Math.}, volume = {79}, number = {2}, year = {1978}, pages = { 503-517}, language = {en}, url = {http://dml.mathdoc.fr/item/1102806145} }
Schultz, Phillip. The typeset and cotypeset of a rank $2$ abelian group.. Pacific J. Math., Tome 79 (1978) no. 2, pp. 503-517. http://gdmltest.u-ga.fr/item/1102806145/