@article{00930061, title = {An epidemic model with density dependent parameters and vaccination.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {19}, year = {1996}, pages = {805-814}, doi = {10.1155/S0161171296001123}, zbl = {0854.92019}, language = {en}, url = {http://dml.mathdoc.fr/item/00930061} }
Khan, Q.J.A.; Bhatt, B.S. An epidemic model with density dependent parameters and vaccination.. International Journal of Mathematics and Mathematical Sciences, Tome 19 (1996) pp. 805-814. doi : 10.1155/S0161171296001123. http://gdmltest.u-ga.fr/item/00930061/