COLOMBO, J.I.; MORALES, C.A. Simplest-expression integrals involving beam-column eigenmodes. Archives of Mechanics, Warsaw, Poland, v. 64, n. 5, p. 529–535, 2012. DOI: 10.24423/aom.696. Disponível em: https://am.ippt.pan.pl/index.php/am/article/view/v64p529. Acesso em: 10 jan. 2026.