SERGALIYEV, A. S.; KHAJIYEVA, L. A. Modelling of Nonlinear Torsional-Flexural Vibrations of Drill Strings. International Journal of Mathematics and Physics, [S. l.], v. 6, n. 2, p. 41–48, 2015. Disponível em: https://ijmph.kaznu.kz/index.php/kaznu/article/view/147. Acesso em: 2 may. 2024.