@article{CLTM_1971_1971_1_a12,
     author = {Rodeja F., E. G.},
     title = {El diagrama de la tricruz y el teorema de homolog{\'\i}a.},
     journal = {Collectanea mathematica},
     pages = {241-258},
     publisher = {mathdoc},
     volume = {22},
     number = {3},
     year = {1971},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/CLTM_1971_1971_1_a12/}
}