BEYGELZIMER, E.; BEYGELZIMER, Y. A simple way to estimate the derivative of an empirical function by its values at unequally spaced points. Materials working by pressure, [S. l.], n. 1(51), p. 21–29, 2022. DOI: 10.37142/2076-2151/2022-1(51)21. Disponível em: http://omd.dgma.donetsk.ua/index.php/main/article/view/185. Acesso em: 28 aug. 2025.