DYMARSKII, Ya. M. On the Manifolds of Eigenvectors of Linear and Quasilinear Finite-Dimensional Self-Adjoint Operators. II. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 53, n. 3, p. 296–301, 2001. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4252. Acesso em: 6 dec. 2025.