Zambrano, M. I., E. A. R. Veliz, G. F. Ormaza, and G. L. Laz. “Comparison Between the Material Improvement of the Megarok and San José Quarries, Applying the AASTHO Standards”. International Research Journal of Engineering, IT & Scientific Research, vol. 3, no. 5, Sept. 2017, pp. 50-57, https://sloap.org/journals/index.php/irjeis/article/view/575.