Asuquo, U., M. Onuu, A. Akpanand, and A. Asuquo. “Noise and Blood Pressure: A Cross Sectional and Longitudinal Study of the Effects of Exposure to Loud Noise on Residents of Calabar, Nigeria”. Canadian Acoustics, vol. 40, no. 3, Sept. 2012, pp. 46-47, https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2532.