@article{CTGDC_1976__17_1_69_0,
     author = {MacDonald, John L.},
     title = {Natural factorizations and the {Kan} extension of cohomology theories},
     journal = {Cahiers de topologie et g\'eom\'etrie diff\'erentielle},
     pages = {69--93},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {17},
     number = {1},
     year = {1976},
     mrnumber = {427417},
     zbl = {0368.55006},
     language = {en},
     url = {http://www.numdam.org/item/CTGDC_1976__17_1_69_0/}
}