Bouathong, C. , Hare, .M. , Losirikul, .M. และ Wongpichet, .K. 2011. Effect of nitrogen rates on plant growth, seed yield and seed quality of three lines of brachiaria hybrid grass. วารสารแก่นเกษตร. 39, 3 (ก.ย. 2011), 295–306.