@article{10_4153_CMB_1981_055_x,
     author = {Ketkar, R. D. and Vanaja, N.},
     title = {R {-Projective} {Modules} over a {Semiperfect} {Ring}},
     journal = {Canadian mathematical bulletin},
     pages = {365--367},
     year = {1981},
     volume = {24},
     number = {3},
     doi = {10.4153/CMB-1981-055-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1981-055-x/}
}