Notes on two definite quadrature formulae of order three. Annual of Sofia University St. Kliment Ohridski. Faculty of Mathematics and Informatics, [S. l.], v. 112, p. 5–16, 2025. DOI: 10.60063/gsu.fmi.112.5-16. Disponível em: https://annual.uni-sofia.bg/index.php/fmi/article/view/1893. Acesso em: 14 dec. 2025.