@article{1102992980,
author = {Toskey, Burnett R.},
title = {A system of canonical forms for rings on a direct sum of two infinite cyclic groups.},
journal = {Pacific J. Math.},
volume = {23},
number = {3},
year = {1967},
pages = { 179-188},
language = {en},
url = {http://dml.mathdoc.fr/item/1102992980}
}
Toskey, Burnett R. A system of canonical forms for rings on a direct sum of two infinite cyclic groups.. Pacific J. Math., Tome 23 (1967) no. 3, pp. 179-188. http://gdmltest.u-ga.fr/item/1102992980/