ZAPRYANOV, Z. Dispertion equation of wave regime for film frainage with elastic properties of interface boundaries. Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 86, n. 2, p. 169–179, 1994. Disponível em: https://admin.uni-sofia.bg/index.php/fmi/article/view/511. Acesso em: 16 jan. 2025.