ISMAIL, A.I.; AMER, T.S.; SHAKER, M.O. Perturbed Motions of a Rotating Symmetric Gyrostat. Engineering Transactions, [S. l.], v. 46, n. 3-4, p. 271–289, 2015. DOI: 10.24423/engtrans.644.1998. Disponível em: https://et.ippt.pan.pl/index.php/et/article/view/644. Acesso em: 18 aug. 2025.