@article{CTGDC_2004__45_3_162_0,
     author = {Kopylov, Yaroslav},
     title = {Exact couples in a {Ra{\"\i}kov} semi-abelian category},
     journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques},
     pages = {162--178},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {45},
     number = {3},
     year = {2004},
     mrnumber = {2090333},
     zbl = {1059.18006},
     language = {en},
     url = {http://www.numdam.org/item/CTGDC_2004__45_3_162_0/}
}