БІЛЕЦЬКИЙ, А. Я.; ПРИСТАВКА, П. О. Approximation of functions of two variables by polynomial spline on the basis of third-order splines. Proceedings of National Aviation University (archive), [S. l.], v. 12, n. 1, p. 64–69, 2002. DOI: 10.18372/2306-1472.12.13566. Disponível em: http://jrnl.kai.edu.ua/index.php/visnik/article/view/13566. Acesso em: 13 apr. 2026.