TY  - JOUR
AU  - Poorfattah, Elnaz
AU  - Jafari Shaerlar, Akbar
TI  - Direct method for solving nonlinear two-dimensional Volterra-Fredholm integro-differential equations by block-pulse functions
JO  - International Journal of Information, Security and Systems Management
VL  - 4
IS  - 1
SP  - 418
EP  - 423
PY  - 2015
DO  - 
ER  -