@article{RRACEFN_1980_1980_1_a29,
     author = {Costal, Fernando},
     title = {Una determinaci\'on de {Feedbacks} de tipo neutro.},
     journal = {Revista de la Real Academia de Ciencias Exactas, F{\'\i}sicas y Naturales},
     year = {1980},
     volume = {74},
     number = {5},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/RRACEFN_1980_1980_1_a29/}
}