Zhang, N., and N. Rattanachaiwong. “Vocal and Linguistic Characteristics of Gaoqiang in Changde Han Opera and Its Pathways for Educational Transmission”. Journal of Multidisciplinary in Humanities and Social Sciences, vol. 8, no. 5, Oct. 2025, pp. 2276-91, https://so04.tci-thaijo.org/index.php/jmhs1_s/article/view/279680.