Zaied, M. B., Dahab, M. H., & Naim, A. M. E. . (2014). Development of a Mathematical Model for Angle of Soil Failure Plane in Case of 3-Dimenssional Cutting. Current Research in Agricultural Sciences, 1(2), 42–52. Retrieved from https://archive.conscientiabeam.com/index.php/68/article/view/58