@article{CLTM_1980_1980_1_a4,
     author = {Castellet, M. and Navarro, J. L.},
     title = {Co-H-estructuras sobre la uni\'on puntual de dos {Co-H-espacios.}},
     journal = {Collectanea mathematica},
     pages = {23-39},
     publisher = {mathdoc},
     volume = {31},
     number = {1},
     year = {1980},
     zbl = {0462.55003},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/CLTM_1980_1980_1_a4/}
}