@article{2964, author = {Vegh, Emanuel}, title = {$\lambda $-primitive roots}, journal = {Portugaliae mathematica}, volume = {40}, year = {1981}, pages = {297-303}, zbl = {0577.10005}, mrnumber = {0819894}, language = {en}, url = {http://dml.mathdoc.fr/item/2964} }
Vegh, Emanuel. $\lambda $-primitive roots. Portugaliae mathematica, Tome 40 (1981) pp. 297-303. http://gdmltest.u-ga.fr/item/2964/