Boonmee, Poramate, and Thamonwan Makrachan. “Psychological Factors Influencing the Pricing and Final Price Analysis of Premium Phone Numbers”. Journal of Digital Communications 10, no. 1 (June 25, 2026): 83–103. accessed September 1, 2026. https://so04.tci-thaijo.org/index.php/NBTC_Journal/article/view/271531.