NAKAI, Mitsuru; SARIO, Leo. A nonexistence test for biharmonic Green’s functions of clamped bodies. MATHEMATICA SCANDINAVICA, [S. l.], v. 40, p. 151–160, 1977. DOI: 10.7146/math.scand.a-11684. Disponível em: https://tidsskrift.dk/math/article/view/11684. Acesso em: 14 aug. 2026.