@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/}
}