HARUTUNYAN, T. N.; SAHAKYAN, G. H. THE EXISTENCE OF THE EIGENVALUES FOR DIRAC’S TWO- PARAMETER BOUNDARY-VALUE PROBLEM. Proceedings of the YSU A: Physical and Mathematical Sciences, Yerevan, Armenia, v. 40, n. 2 (210), p. 25–40, 2006. DOI: 10.46991/PYSU:B/2007.41.2.025. Disponível em: https://pub.ysu.am/index.php/proceedings-phys-math/article/view/vol40_no2_2006_pp025-040. Acesso em: 20 sep. 2024.