สิริรัตนชัยกุล สุรัตน์ชัย. 2019. “The Identity of the Hand Patterns of the Khong Wong Yai Playing of Khru Somphob Khamprasert’s Tra Nimit in Second Variation”. Rangsit Music Journal 14 (1):38-52. https://so06.tci-thaijo.org/index.php/rmj/article/view/167532.