Jutimongkonkul, K. ., Pentrakoon, D. ., & Wonglimpiyarat, J. . (2021). Challenges and factors affecting patent valuation: The case of Thailand 4.0. Kasetsart Journal of Social Sciences, 42(2), 227–232. Retrieved from https://so04.tci-thaijo.org/index.php/kjss/article/view/251190