SOME APPLICATIONS OF WEYL CALCULUS TO BURCHNALL-CHAUNDY THEORY, IV. Far East Journal of Mathematical Sciences (FJMS), [S. l.], v. 143, n. 2, p. 287–296, 2025. DOI: 10.17654/0972087126018. Disponível em: https://pphmjopenaccess.com/fejms/article/view/3685. Acesso em: 5 jan. 2026.