@article{1256045846, author = {Froelich, John}, title = {The isomorphism problem for incidence rings}, journal = {Illinois J. Math.}, volume = {29}, number = {4}, year = {1985}, pages = { 142-152}, language = {en}, url = {http://dml.mathdoc.fr/item/1256045846} }
Froelich, John. The isomorphism problem for incidence rings. Illinois J. Math., Tome 29 (1985) no. 4, pp. 142-152. http://gdmltest.u-ga.fr/item/1256045846/