VARDANYAN, N.K. ON CONSTANT COEFFICIENT PDE SYSTEMS AND INTERSECTION MULTIPLICITIES. Proceedings of the YSU A: Physical and Mathematical Sciences, Yerevan, Armenia, v. 54, n. 2 (252), p. 108–114, 2020. DOI: 10.46991/PYSU:A/2020.54.2.108. Disponível em: https://journals.ysu.am/index.php/proceedings-phys-math/article/view/vol54_no2_2020_pp108-114. Acesso em: 22 jul. 2024.