@article{MS2_1966__19_165961,
     author = {Per Holm},
     title = {Excision and {Cofibrations.}},
     journal = {Mathematica Scandinavica},
     pages = {122--126},
     publisher = {mathdoc},
     volume = {19},
     year = {1966},
     zbl = {0145.43701},
     url = {http://geodesic.mathdoc.fr/item/MS2_1966__19_165961/}
}