Sangiamdee, D., C. Sriviboon, K. Boonpragob, P. Khongsatra, and S. Tansuwan. “The Correlation of Lecanoric Acid With Atranorin in Lichen Parmotrema Tinctorum”. Ramkhamhaeng Research Journal of Sciences and Technology, vol. 22, no. 2, Dec. 2019, pp. 81-87, https://li01.tci-thaijo.org/index.php/rusci/article/view/232519.