Akowuah, E., J. Ampofo, and P. Y. Andoh. “Evaluation of Ramp-Induced Vibration Exposure Level for a Pregnant Woman Commuting Along Urban Roads in Ghana”. AFRICAN JOURNAL OF APPLIED RESEARCH, vol. 5, no. 1, Apr. 2019, pp. 60-73, https://ajaronline.com/index.php/AJAR/article/view/306.