Promsomboon, P., Sennoi, R., Puthmee, T., Marubodee, R., Ruanpan, W., and Promsomboon, S., “Effect of seedlings numbers per hill on the growth and yield of Kum Bangpra RiceVariety (Oryza sativa L.)”, Int. J. Agric. Tech., vol. 15, no. 1, pp. 103–112, Jan. 2019.