Nadjafi, Jafar, and Fahimeh Akhavan Ghassabzade. 2014. “The Numerical Solution of the Singularly Perturbed Differential-Difference Equations Based on the Meshless Method”. International Journal of Applied Mathematical Research 3 (2): 116-21. https://doi.org/10.14419/ijamr.v3i2.1595.