Salehi Shayegan, A.H., Zakeri, A. and Hosseini, S.M. 2020. A numerical method for solving two-dimensional nonlinear parabolic problems based on a preconditioning operator. Mathematical Modelling and Analysis. 25, 4 (Oct. 2020), 531-545. DOI:https://doi.org/10.3846/mma.2020.4310.