Y.C Isah, E.E. Idolor, A.N Ofili, and E.C Isah. “Awareness And Perception of Global Warming Among Undergraduate Medical Students in A Nigerian University”. Journal of Community Medicine & Primary Health Care, vol. 23, no. 1-2, Jan. 2013, pp. 32-40, https://jcmphc.org/index.php/jcmphc/article/view/216.