@article{CMUC_1975_16_1_a11,
     author = {Moran, Daniel A.},
     title = {Minimal cell coverings of sphere bundles over spheres},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {147--149},
     year = {1975},
     volume = {16},
     number = {1},
     mrnumber = {0365582},
     zbl = {0309.55018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1975_16_1_a11/}
}