First so(2)-Relative Cohomology of Vec(R) Acting on the Space of Bilinear Bidifferential Operators. Journal of Prime Research in Mathematics, [S. l.], v. 22, n. 1, p. 120–131, 2026. Disponível em: https://jprm.sms.edu.pk/index.php/jprm/article/view/317. Acesso em: 16 mar. 2026.