Zaied, Moayad B, Mohammed H Dahab, and Ahmed M. El Naim. “Development of a Mathematical Model for Angle of Soil Failure Plane in Case of 3-Dimenssional Cutting”. Current Research in Agricultural Sciences 1, no. 2 (June 25, 2014): 42–52. Accessed November 24, 2024. https://archive.conscientiabeam.com/index.php/68/article/view/58.