@article{2961, author = {Basto Gon\c calves, J.}, title = {Equival\^encia de sistemas de gradiente}, journal = {Portugaliae mathematica}, volume = {40}, year = {1981}, pages = {263-277}, zbl = {0562.93042}, mrnumber = {0819891}, language = {es}, url = {http://dml.mathdoc.fr/item/2961} }
Basto Gonçalves, J. Equivalência de sistemas de gradiente. Portugaliae mathematica, Tome 40 (1981) pp. 263-277. http://gdmltest.u-ga.fr/item/2961/