ON TURAN’S INEQUALITY FOR ULTRASPHERICAL POLYNOMIALS. Annual of Sofia University St. Kliment Ohridski. Faculty of Mathematics and Informatics, [S. l.], v. 101, p. 105–114, 2013. Disponível em: https://annual.uni-sofia.bg/index.php/fmi/article/view/233. Acesso em: 14 dec. 2025.