Wijitphan, S., and P. Lowilai. “Effects of Cutting Interval on Yields and Nutritive Values of King Napier Grass (Pennisetum Purpureum Cv. King Grass) under Irrigation Supply”. Asia-Pacific Journal of Science and Technology, vol. 16, no. 3, Apr. 2017, pp. 215-24, https://so01.tci-thaijo.org/index.php/APST/article/view/83212.