Shen, Qinjie, and Chunyang Wei. “Business Model Innovation in the Trading Card Grading Industry: Cross-National Insights from Pokémon Trading Card Game and Non-Fungible Tokens”. American Journal of Business Science Philosophy 2, no. 2 (July 7, 2025): 217–234. Accessed April 1, 2026. http://americanosp.com/index.php/AJBSP/article/view/56.