@article{1103039459, author = {Lyndon, Roger C.}, title = {Properties preserved under homomorphism.}, journal = {Pacific J. Math.}, volume = {9}, number = {4}, year = {1959}, pages = { 143-154}, language = {en}, url = {http://dml.mathdoc.fr/item/1103039459} }
Lyndon, Roger C. Properties preserved under homomorphism.. Pacific J. Math., Tome 9 (1959) no. 4, pp. 143-154. http://gdmltest.u-ga.fr/item/1103039459/