@article{01852897,
title = {Characterizations of projective and },
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {30},
year = {2002},
pages = {439-448},
doi = {10.1155/S0161171202109227},
zbl = {1013.16037},
language = {en},
url = {http://dml.mathdoc.fr/item/01852897}
}
Al-Thani, Huda Mohammed J. Characterizations of projective and . International Journal of Mathematics and Mathematical Sciences, Tome 30 (2002) pp. 439-448. doi : 10.1155/S0161171202109227. http://gdmltest.u-ga.fr/item/01852897/