LECKAR, Hamilton F.; SAMPAIO, Rubens. Problems in incompressible linear elasticity involving tangential and normal components of the displacement field. Pro Mathematica, [S. l.], v. 12, n. 23-24, p. 91–101, 1998. Disponível em: https://revistas.pucp.edu.pe/index.php/promathematica/article/view/8131. Acesso em: 12 dic. 2025.