[1]
Jate Sathornkich, Krisada Sangsing, Sornprach Thanisawanyangkura, and Jessada Phattaralerphong, “Estimation of Rubber Tree Canopy Structure Using a Photographic Method”, Agr. Nat. Resour., vol. 44, no. 1, pp. 24–34, Feb. 2010.