The exact sequence in the homology of groups with integral coefficients modulo q associated to two normal subgroups
Cahiers de Topologie et Géométrie Différentielle Catégoriques, Tome 32 (1991) no. 2, pp. 113-129. 
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     author = {Rodr{\'\i}guez-Fern\'andez, C. and Rodeja Fern\'andez, E. G.},
     title = {The exact sequence in the homology of groups with integral coefficients modulo $q$ associated to two normal subgroups},
     journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques},
     pages = {113--129},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {32},
     number = {2},
     year = {1991},
     mrnumber = {1142685},
     zbl = {0758.20012},
     language = {en},
     url = {http://archive.numdam.org/item/CTGDC_1991__32_2_113_0/}
}
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Rodríguez-Fernández, C.; Rodeja Fernández, E. G. The exact sequence in the homology of groups with integral coefficients modulo $q$ associated to two normal subgroups. Cahiers de Topologie et Géométrie Différentielle Catégoriques, Tome 32 (1991) no. 2, pp. 113-129. http://archive.numdam.org/item/CTGDC_1991__32_2_113_0/

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