Tudsri, S., N. Bumrung, and Y. Jingnay. “Productivity and Quality of CP-Pangola (Digitaria decumbens cv. CP-1) under Different Managements III Effect of Split Nitrogen Application”. Agriculture and Natural Resources, vol. 33, no. 3, Sept. 1999, pp. 303-9, https://li01.tci-thaijo.org/index.php/anres/article/view/240446.