@article{CLTM_1968_1968_1_a1,
     author = {Cascante D\'avila, Joaqu{\'\i}n M.{\textordfeminine}},
     title = {Algunos criterios relativos a estructuras iniciales.},
     journal = {Collectanea mathematica},
     pages = {11-20},
     year = {1968},
     volume = {19},
     number = {1-2},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/CLTM_1968_1968_1_a1/}
}