@article{10_1017_S0017089500004511,
     author = {Humphreys, J. F.},
     title = {Projective modular representations of finite groups {II}},
     journal = {Glasgow mathematical journal},
     pages = {89--99},
     year = {1981},
     volume = {22},
     number = {1},
     doi = {10.1017/S0017089500004511},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500004511/}
}