@article{1250181485, author = {Min\'a\v c, J. and Spira, M.}, title = {$u = 4$ and quadratic extensions}, journal = {Rocky Mountain J. Math.}, volume = {19}, number = {4}, year = {1989}, pages = { 833-846}, language = {en}, url = {http://dml.mathdoc.fr/item/1250181485} }
Mináč, J.; Spira, M. $u = 4$ and quadratic extensions. Rocky Mountain J. Math., Tome 19 (1989) no. 4, pp. 833-846. http://gdmltest.u-ga.fr/item/1250181485/