Chailertwanich, Ornpapa, and Chedsada Noppawinyoowong. 2014. “Chemical Stability of Ketoconazole Ear Drops in Srinagarind Hospital”. Srinagarind Medical Journal 29 (4):111. https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/23730.