@article{1183506622, author = {Mann, Henry B.}, title = {On certain systems which are almost groups}, journal = {Bull. Amer. Math. Soc.}, volume = {50}, number = {12}, year = {1944}, pages = { 879-881}, language = {en}, url = {http://dml.mathdoc.fr/item/1183506622} }
Mann, Henry B. On certain systems which are almost groups. Bull. Amer. Math. Soc., Tome 50 (1944) no. 12, pp. 879-881. http://gdmltest.u-ga.fr/item/1183506622/