Klyprayong, S., P. Wongsurakiat, P. Tappayuthpijarn, and B. Dhorranintra. “Could Mawaeng Krueo Fruits (Solanum trilobatum Linn) Produce Expectoration Effect ?”. Journal of Basic and Applied Pharmacology, vol. 23, July 2015, p. S120, https://li01.tci-thaijo.org/index.php/JBAP/article/view/37242.