Nosheen, M., J. Iqbal, and S. Ahmad. “The Implications of Ecological Footprint for EKC Hypothesis by Considering Cross-Section Dependence and Heterogeneity”. Journal of Contemporary Macroeconomic Issues, vol. 4, no. 1, June 2023, pp. 28-42, https://ojs.scekr.org/index.php/jcmi/article/view/68.