Sayah, M., and F. . Abou-Donia. “Response to Partial Replacement of Yellow Corn With Sub-Graded Sweet Potato Tuber As a Non-Traditional Source of Energy on the Productive and Reproductive Performance of Dairy Cows”. Journal of King Abdulaziz University: Meteorology, Environment and Arid Land Agriculture, vol. 31, no. 1, Oct. 2022, pp. 55-63, doi:10.4197/Met. 31-1.6.