VALEYEV, K. G.; LAPSHIN, A. L. Optimization of solutions of a linear control system. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 49, n. 10, p. 1429–1431, 1997. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5140. Acesso em: 5 dec. 2025.