คนยัง อ., สายยศ ส. and วะยะลุน พ. (2014) “Reduce the Complexity of Estimation a 2D Horizontal Directional Sound Using Cross-correlation Method for the Recognition of Robot Voice Directions”, KKU Science Journal, 42(3), pp. 658–669. available at: https://ph01.tci-thaijo.org/index.php/KKUSciJ/article/view/249294 (accessed: 27 August 2026).