Martynova, T. S., G. V. Muratova, I. N. Shabas, and V. V. Bavin. “Multigrid Methods With Skew-Hermitian Based Smoothers for the convection–diffusion Problem With Dominant Convection”. Numerical Methods and Programming (Vychislitel’nye Metody I Programmirovanie), vol. 23, no. 71, Mar. 2022, pp. 46-59, doi:10.26089/NumMet.v23r104.