@article{05897796, title = {On the existence of equilibrium points, boundedness, oscillating behavior and positivity of a SVEIRS epidemic model under constant and impulsive vaccination.}, journal = {Advances in Difference Equations [electronic only]}, volume = {2011}, year = {2011}, doi = {10.1155/2011/748608}, zbl = {1219.34066}, language = {en}, url = {http://dml.mathdoc.fr/item/05897796} }
De La Sen, M.; Agarwal, Ravi P.; Ibeas, A.; Alonso-Quesada, S. On the existence of equilibrium points, boundedness, oscillating behavior and positivity of a SVEIRS epidemic model under constant and impulsive vaccination.. Advances in Difference Equations [electronic only], Tome 2011 (2011) . doi : 10.1155/2011/748608. http://gdmltest.u-ga.fr/item/05897796/