RAKHIMOV, D. G. On Bifurcation of Noether Points in Discrete Spectrum of Linear Operators. Eurasian Mathematical Journal, [S. l.], v. 6, n. 2, p. 75–81, 2015. Disponível em: https://emj.enu.kz/index.php/main/article/view/609. Acesso em: 19 sep. 2025.