Ivanov Г. Г.; Alferov Г. В.; Korolev В. С. Study of Almost Periodic Solutions of Differential Equations. BULLETIN OF PERM UNIVERSITY. MATHEMATICS. MECHANICS. COMPUTER SCIENCE, [S. l.], n. 4 (63), p. 22–35, 2023. DOI: 10.17072/1993-0550-2023-4-22-35. Disponível em: https://press.psu.ru/index.php/Math/article/view/8016. Acesso em: 17 may. 2024.