Tayyab, Muhammad, and Abrar Ahmad. “An Application of Contingent Valuation Method for Reduction in Risk of Premature Mortality Due to Air Pollution: A Case Study of Gujranwala, Pakistan”. Empirical Economic Review 6, no. 2 (December 30, 2023): 92-114. Accessed November 24, 2024. https://ojs.umt.edu.pk/index.php/eer/article/view/1559.