@article{1183509413, author = {Whitman, Philip M.}, title = {Lattices, equivalence relations, and subgroups}, journal = {Bull. Amer. Math. Soc.}, volume = {52}, number = {12}, year = {1946}, pages = { 507-522}, language = {en}, url = {http://dml.mathdoc.fr/item/1183509413} }
Whitman, Philip M. Lattices, equivalence relations, and subgroups. Bull. Amer. Math. Soc., Tome 52 (1946) no. 12, pp. 507-522. http://gdmltest.u-ga.fr/item/1183509413/