@article{RRACEFN_1984_1984_1_a3,
     author = {de Mar{\'\i}a, Jos\'e L. and  Rodr{\'\i}guez-Salinas, Baltasar},
     title = {Sobre el coraz\'on de una funci\'on vectorial.},
     journal = {Revista de la Real Academia de Ciencias Exactas, F{\'\i}sicas y Naturales },
     publisher = {mathdoc},
     volume = {78},
     number = {1-2},
     year = {1984},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/RRACEFN_1984_1984_1_a3/}
}