@article{IM_1970__11_142055,
     author = {A. Bialynicki-Birula},
     title = {Rationally {Trivial} {Homogeneous} {Principal} {Fibrations} of {Schemes.}},
     journal = {Inventiones mathematicae},
     pages = {259--262},
     publisher = {mathdoc},
     volume = {11},
     year = {1970},
     zbl = {0213.47301},
     url = {http://geodesic.mathdoc.fr/item/IM_1970__11_142055/}
}