HARUTYUNYAN, T. A. THE PROBLEM OF OWN VALUES AND OWN FUNCTIONS IN THE TOROIDAL CAVITY. Proceedings of the YSU A: Physical and Mathematical Sciences, Yerevan, Armenia, v. 39, n. 3 (208), p. 64–72, 2005. DOI: 10.46991/PYSU:A/2005.39.3.064. Disponível em: https://journals.ysu.am/index.php/proceedings-phys-math/article/view/vol39_no3_2005_pp64-72. Acesso em: 22 jul. 2024.