Ibtihal Thabit Jameel, Athraa Falih Hasan, Duaa Jasim and Fatima M. Aboud 2023. Solving Inverse Cauchy Problems of the Helmholtz Equation Using Conjugate Gradient Based-Method: BICG, BICGSTAB And PCG. Academic Science Journal. 1, 4 (Oct. 2023), 13–31. DOI:https://doi.org/10.24237/ASJ.01.04.652D.