Poonpaiboonpipat, Thanatsan. 2017. “Allelopathic Effect of Barleria lupulina Lindl.on Germination and Seedling Growth of Pigweed and Barnyardgrass”. Asian Health, Science and Technology Reports 25 (4):44-50. https://ph03.tci-thaijo.org/index.php/ahstr/article/view/1670.