KARAPRTYAN, G. A.; DARBINYAN, A. A. NOETHERICITY OF SEMI-ELLIPTICAL OPERATOR WITH CONSTANT COEFFICIENTS IN THE RANGE. Proceedings of the YSU A: Physical and Mathematical Sciences, Yerevan, Armenia, v. 42, n. 3 (217), p. 16–24, 2023. DOI: 10.46991/PYSU:A/2008.42.3.016. Disponível em: https://pub.ysu.am/index.php/proceedings-phys-math/article/view/vol42_no3_2008_p016-024. Acesso em: 23 nov. 2024.