%0 Journal Article %A Ding, D. %A Ma, Q. %A Ding, X. %T An unconditionally positive and global stability preserving NSFD scheme for an epidemic model with vaccination %J International Journal of Applied Mathematics and Computer Science %D 2014 %P 635-646 %V 24 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/IJAMCS_2014_24_3_a12/ %G en %F IJAMCS_2014_24_3_a12