Çağlayan-Akay, E., and M. H. Van. “Determinants of the Levels of Development Based on the Human Development Index:Bayesian Ordered Probit Model”. International Journal of Economics and Financial Issues, vol. 7, no. 5, Oct. 2017, pp. 425-31, https://www.econjournals.com/index.php/ijefi/article/view/5271.