LECHMAN, M. Resistance of Rc Annular Cross-Sections With Openings Subjected to Axial Force and Bending. Engineering Transactions, [S. l.], v. 56, n. 1, p. 43–64, 2014. DOI: 10.24423/ENGTRANS.209.2008. Disponível em: https://et.ippt.pan.pl/index.php/et/article/view/209. Acesso em: 25 jul. 2025.