Sayavong, S., N. Kaewjampa, R. Katawatin, C. Boonthai Iwai, S. Moukomla, J. Oszwald, and A. Pierret. “Mapping rubber stand ages in Luangnamtha district (Northern Laos) using NDVI and LSWI from Landsat images”. Asia-Pacific Journal of Science and Technology, vol. 24, no. 2, June 2019, pp. APST-24, doi:10.14456/apst.2019.18.