Глазунов, Н. В., and С. П. Соловей. “Methods of Parameterization and Approximation of Real Surfaces”. Problems of Informatization and Control 1, no. 25 (March 10, 2009): 28–33. Accessed June 14, 2026. http://jrnl.kai.edu.ua/index.php/PIU/article/view/6927.