ELLIFRITT, Duane S. The Mysterious One-Third Stress Increase. Engineering Journal, [S. l.], v. 14, n. 4, p. 138–140, 1977. DOI: 10.62913/engj.v14i4.300. Disponível em: https://ej.aisc.org/index.php/engj/article/view/300. Acesso em: 12 feb. 2025.