@article{1102708969,
author = {Arnold, D. and Vinsonhaler, C.},
title = {Typesets and cotypesets of rank-$2$ torsion free abelian groups.},
journal = {Pacific J. Math.},
volume = {115},
number = {2},
year = {1984},
pages = { 1-21},
language = {en},
url = {http://dml.mathdoc.fr/item/1102708969}
}
Arnold, D.; Vinsonhaler, C. Typesets and cotypesets of rank-$2$ torsion free abelian groups.. Pacific J. Math., Tome 115 (1984) no. 2, pp. 1-21. http://gdmltest.u-ga.fr/item/1102708969/