POTAPENKO, I. V. On the reconstruction of the variation of the metric tensor of a surface on the basis of a given variation of christoffel symbols of the second kind under infinitesimal deformations of surfaces in the euclidean space $E_3$. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 63, n. 4, p. 523–530, 2011. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2738. Acesso em: 14 apr. 2025.