@article{CTGDC_1987__28_1_79_0,
     author = {Rodicio, Antonio G.},
     title = {A homological exact sequence associated with a family of normal subgroups},
     journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques},
     pages = {79--82},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {28},
     number = {1},
     year = {1987},
     mrnumber = {903154},
     zbl = {0632.20033},
     language = {en},
     url = {http://www.numdam.org/item/CTGDC_1987__28_1_79_0/}
}