%0 Journal Article %A sadigh behzadi, shadan, Gervehei, F., Rafie, A. %T Optimal solution for Koper-Schmidt equation using Jacobi and Airfoil expansion methods %J Journal of New Researches in Mathematics %V 7 %N 3 %P 205-216 %D 2021 %R %U https://sanad.iau.ir/fa/Article/797533