Ungpakorn , J. G. (2003) “The Importance of Trotskyite Socialism at the Present Time ”, Journal of the Faculty of Arts, Silpakorn University, 26(2), pp. 13–39. available at: https://so04.tci-thaijo.org/index.php/jasu/article/view/250791 (accessed: 30 September 2026).