DIOPHANTINE APPROXIMATION BY PRIME NUMBERS OF A SPECIAL FORM. Annual of Sofia University St. Kliment Ohridski. Faculty of Mathematics and Informatics, [S. l.], v. 102, p. 71–90, 2015. Disponível em: https://annual.uni-sofia.bg/index.php/fmi/article/view/64. Acesso em: 14 dec. 2025.