CHRISTOV, C. A first-order in thickness model for flexural deformations of geometrically non-linear shells. Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 89, p. 129–140, 1997. Disponível em: https://admin.uni-sofia.bg/index.php/fmi/article/view/362. Acesso em: 15 jan. 2025.