Baranov, A., and M. Permyakov. “Analysis of Accuracy and Computational Efficiency of the Contour Advection Method for the Barotropic Vorticity Equation”. Numerical Methods and Programming (Vychislitel’nye Metody I Programmirovanie), vol. 15, no. 40, May 2014, pp. 337-50, https://en.num-meth.ru/index.php/journal/article/view/772.