Transformation  of degenerate indirect control systems in the vicinity of a program manifold. Kazakh Mathematical Journal, [S. l.], v. 24, n. 4, p. 52–62, 2025. DOI: 10.70474/wcda3590. Disponível em: https://mathjournal.kz/index.php/kmj/article/view/27. Acesso em: 31 jan. 2025.