@article{RSMUP_1985__73__49_0, author = {Hausen, Jutta and Johnson, Johnny A.}, title = {On the existence of projective and quasi-projective covers}, journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova}, volume = {74}, year = {1985}, pages = {49-54}, mrnumber = {799896}, zbl = {0571.16015}, language = {en}, url = {http://dml.mathdoc.fr/item/RSMUP_1985__73__49_0} }
Hausen, Jutta; Johnson, Johnny A. On the existence of projective and quasi-projective covers. Rendiconti del Seminario Matematico della Università di Padova, Tome 74 (1985) pp. 49-54. http://gdmltest.u-ga.fr/item/RSMUP_1985__73__49_0/
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