MAZHITOVA, A. D. Sub-Riemannian problem on three dimensional solvable Lie group. Journal of Mathematics, Mechanics and Computer Science, [S. l.], v. 65, n. 2, p. 11–18, 2010. Disponível em: https://bm.kaznu.kz/index.php/kaznu/article/view/228. Acesso em: 15 jan. 2025.