@article{MS2_1967__20_165987,
     author = {I. Madsen and A. Kock and L. Kristensen},
     title = {Cochain {Functors} for {General} {Cohomology} {Theories} {I.}},
     journal = {Mathematica Scandinavica},
     pages = {131--150},
     publisher = {mathdoc},
     volume = {20},
     year = {1967},
     zbl = {0166.18903},
     url = {http://geodesic.mathdoc.fr/item/MS2_1967__20_165987/}
}