YAMAMOTO, Kazuhiro. Exponential energy decay of solutions of elastic wave equations with the Dirichlet condition. MATHEMATICA SCANDINAVICA, [S. l.], v. 65, p. 206–220, 1989. DOI: 10.7146/math.scand.a-12279. Disponível em: https://tidsskrift.dk/math/article/view/12279. Acesso em: 14 aug. 2026.