FAVOROV, S.; UDODOVA, O. Almost periodic functions in finite-dimensional space with the spectrum in a cone. Математическая физика, анализ, геометрия, Харків, Україна, v. 9, n. 3, p. 465–477, 2002. Disponível em: https://mag.ilt.kharkiv.ua/index.php/mag/article/view/m09-0465e. Acesso em: 21 лис. 2024.