Shah, S., I. H. Khan, and G. R. Mehboob. “Catastrophic Health Expenditures and Its Socio-Economic Consequences: A Case Study of Tehsil Utman Khel Tribal District, Bajaur”. Pakistan Journal of Economic Studies (PJES), vol. 3, no. 1, June 2020, pp. 87-104, https://journals.iub.edu.pk/index.php/pjes/article/view/337.