@article{10_4153_CMB_1966_005_1,
     author = {Kuyk, Willem},
     title = {Note on {Generalized} {Schreier} {Extensions} of {Groups}},
     journal = {Canadian mathematical bulletin},
     pages = {43--47},
     year = {1966},
     volume = {9},
     number = {1},
     doi = {10.4153/CMB-1966-005-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1966-005-1/}
}