Arushanian, O., N. Bogomolov, and A. Kovalev. “Tools for Working With Parametrized Graphic Representations in the ADEPT Tool Kit”. Numerical Methods and Programming (Vychislitel’nye Metody I Programmirovanie), vol. 8, no. 14, Dec. 2007, pp. 78-81, https://en.num-meth.ru/index.php/journal/article/view/288.