@article{RMI_1986_1986_1_a19,
     author = {Porta, Horacio and Recht, L\'azaro},
     title = {Formas equivalentes a curvaturas.},
     journal = {Revista matem\'atica iberoamericana},
     pages = {397-403},
     publisher = {mathdoc},
     volume = {2},
     number = {4},
     year = {1986},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RMI_1986_1986_1_a19/}
}