Twumasi - Ampofo, K., and R. A. Oppong. “Dilemma of Sustainable Roof Forms in Warm-Humid Climatic Zones: A Survey of Parapet Roofs in Kumasi, Ghana”. AFRICAN JOURNAL OF APPLIED RESEARCH, vol. 4, no. 2, Dec. 2018, pp. 203-15, https://ajaronline.com/index.php/AJAR/article/view/290.