@article{10_4153_CMB_1977_051_9,
     author = {Piccinini, Renzo A.},
     title = {Some {Results} in the {Theory} of {Fibrations}},
     journal = {Canadian mathematical bulletin},
     pages = {337--345},
     year = {1977},
     volume = {20},
     number = {3},
     doi = {10.4153/CMB-1977-051-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1977-051-9/}
}