Thongyai, Srikanya, Nattha Kaewnopparat, and Sarunyoo Songkro. 2016. “Influence of Polyvinylpyrrolidone K30 on The Complexation of Tetrahydrocurcumin with Hydroxypropyl β-Cyclodextrin”. Asian Health, Science and Technology Reports 24 (2):34-42. https://ph03.tci-thaijo.org/index.php/ahstr/article/view/1897.