@article{1102805786,
author = {Bergman, George M. and Dicks, Warren},
title = {Universal derivations and universal ring constructions.},
journal = {Pacific J. Math.},
volume = {79},
number = {2},
year = {1978},
pages = { 293-337},
language = {en},
url = {http://dml.mathdoc.fr/item/1102805786}
}
Bergman, George M.; Dicks, Warren. Universal derivations and universal ring constructions.. Pacific J. Math., Tome 79 (1978) no. 2, pp. 293-337. http://gdmltest.u-ga.fr/item/1102805786/