Silva , F., J. Freitas, W. Luz, D. Almeida, and A. Mendes. “Evaluation of the Addition of Steel Fibers in Lightweight Structural Concrete (134-137)”. ITEGAM-JETIA, Vol. 4, no. 16, Dec. 2018, pp. 134-7, http://br940.teste.website/~itegamjetia/journal/index.php/jetia/article/view/338.