@article{CLTM_1973_1973_1_a16,
     author = {Castellet, Manuel},
     title = {Caracter{\'\i}stica de {Euler} y categor{\'\i}as de fracciones.},
     journal = {Collectanea mathematica},
     pages = {211-217},
     publisher = {mathdoc},
     volume = {24},
     number = {3},
     year = {1973},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/CLTM_1973_1973_1_a16/}
}