A Determination of fracture toughness in plain concrete specimens by R curve. Fracture and Structural Integrity, [S. l.], v. 13, n. 49, p. 763–774, 2019. DOI: 10.3221/IGF-ESIS.49.68. Disponível em: https://staging.fracturae.com/index.php/fis/article/view/2518. Acesso em: 16 oct. 2026.