@article{MS2_1974__35_166380,
     author = {P.I. Booth},
     title = {Fibrations and {Cofibred} {Pairs.}},
     journal = {Mathematica Scandinavica},
     pages = {145--148},
     publisher = {mathdoc},
     volume = {35},
     year = {1974},
     zbl = {0302.55004},
     url = {http://geodesic.mathdoc.fr/item/MS2_1974__35_166380/}
}