Sukhinov, A.I., A.E. Chistyakov, and E.A. Protsenko. 2019. “Upwind and Standard Leapfrog Difference Schemes”. Numerical Methods and Programming (Vychislitel’nye Metody I Programmirovanie) 20 (60):170-81. https://doi.org/10.26089/NumMet.v20r216.