Piraintorn , P. “The Use of Weak Signal in Strategic Scanning to Turn Covid Threat to Opportunity: A Case of Health Insurance Business in Thailand”. APHEIT International Journal of Interdisciplinary Social Sciences and Technology, vol. 12, no. 2, Dec. 2023, pp. 34-42, https://so04.tci-thaijo.org/index.php/ATI/article/view/265628.