@article{1256044630, author = {Higman, Graham}, title = {The solubility of sets of equations over groups}, journal = {Illinois J. Math.}, volume = {30}, number = {3}, year = {1986}, pages = { 222-229}, language = {en}, url = {http://dml.mathdoc.fr/item/1256044630} }
Higman, Graham. The solubility of sets of equations over groups. Illinois J. Math., Tome 30 (1986) no. 3, pp. 222-229. http://gdmltest.u-ga.fr/item/1256044630/