@article{1028998231, author = {Higman, D. G.}, title = {On isomorphisms of orders.}, journal = {Michigan Math. J.}, volume = {6}, number = {1}, year = {1959}, pages = { 255-257}, language = {en}, url = {http://dml.mathdoc.fr/item/1028998231} }
Higman, D. G. On isomorphisms of orders.. Michigan Math. J., Tome 6 (1959) no. 1, pp. 255-257. http://gdmltest.u-ga.fr/item/1028998231/