Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{PORMA_1942__3_3_114607, author = {Vicente Gon\c{c}alves, J.}, title = {Sur les syst\`emes de fonctions \`a jacobien nul}, journal = {Portugaliae mathematica}, pages = {157--170}, publisher = {mathdoc}, volume = {3}, number = {3}, year = {1942}, mrnumber = {0007018}, zbl = {0027.05101}, language = {fr}, url = {http://geodesic.mathdoc.fr/item/PORMA_1942__3_3_114607/} }
Vicente Gonçalves, J. Sur les systèmes de fonctions à jacobien nul. Portugaliae mathematica, Tome 3 (1942) no. 3, pp. 157-170. http://geodesic.mathdoc.fr/item/PORMA_1942__3_3_114607/