Vuong, Quan- Hoang. “Empirical Probabilities of (non)optimal Healthcare Choice Conditional on Socio-Economic Status and Time Consumption”. Indian Journal of Community Health 28, no. 3 (September 30, 2016): 286–290. Accessed April 20, 2024. http://www.iapsmupuk.org/journal/index.php/IJCH/article/view/689.