A. Mohammadi Torkashvand and  N. Haghighat,  Investigation of Some Methodologies in Providing Erosion Maps of Surface, Rill and Gully and Erosion Features.   journal   = {International Journal of Geological and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2010, vol. 44(8). 378 - 381
    [viewed 20 January 2020]. Available from: https://publications.waset.org/pdf/2952.