On a Dirac type quantization algorithm for the Neumann - Bogoliubov oscillatory dynamical system. Neliniini Kolyvannya, [S. l.], v. 4, n. 1, p. 106–111, 2001. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/158. Acesso em: 22 jan. 2026.