PETROVA, Ludmila. Nonidentical relations of skew-symmetric forms: Generation of closed exterior forms. Discrete transitions. Connection between field-theory equations and nonidentical relations. International Journal of Advanced Mathematical Sciences, [S. l.], v. 4, n. 2, p. 30–36, 2016. DOI: 10.14419/ijams.v4i2.6635. Disponível em: https://sciencepubco.com/index.php/IJAMS/article/view/6635.. Acesso em: 12 apr. 2025.