Tocharus, Chainarong, Rattima Jeenapongsa, Thanasak Teakthong, and Yuthana Smitasiri. 2005. “Effects of Long-term Treatment of Butea superba on Sperm Motility”. Asian Health, Science and Technology Reports 13 (2):11-17. https://ph03.tci-thaijo.org/index.php/ahstr/article/view/2414.