SAHAKIAN, G. H. ON COMPLETNESS OF EIGENVECTORS FOR DIRAC TWO PARAMETER BOUNDARY PROBLEM. Proceedings of the YSU A: Physical and Mathematical Sciences, Yerevan, Armenia, v. 36, n. 1 (197), p. 9–14, 2002. DOI: 10.46991/PYSUA.2002.36.1.009. Disponível em: https://journals.ysu.am/index.php/proceedings-phys-math/article/view/vol36_no1_2002_pp009-014. Acesso em: 21 jan. 2026.