@article{ author = {Sahihi, H., Abbasbandy, Saeid, الهویرانلو, توفیق}, title = {Homotopy analysis method and its application for singularly perturbed delay differential equations with layer behavior}, journal = {Journal of New Researches in Mathematics}, year = {2020}, volume = {6}, issue = {1}, pages = {29-38}, doi = {}, url = {https://sanad.iau.ir/fa/Article/797715} }