Muhammed, K., K. Umeh, S. Nasir, and I. Suleiman. “Understanding the Barriers to the Utilization of Primary Health Care in a Low-Income Setting: Implications for Health Policy and Planning”. Journal of Public Health in Africa, Vol. 4, no. 2, Oct. 2013, p. e13, doi:10.4081/jphia.2013.e13.