TESSEMA, M. C.; TUKE, A.; MOHAMAD, A.; RABAYO, K.; YADETA, K. T.; YADETA, K. T. How Do Help “Multigrid Principles based on Numerical Solutions of Partial Differential Equations” for Smoothing Process (Concepts)?. Journal La Multiapp, v. 3, n. 3, p. 84-92, 20 Jun. 2022.