Xu, K., Evans, D., Carrin, G. and Aguilar-Rivera, A.M. (2005) Designing Health Financing Systems to Reduce Catastophic Health Expenditure. Technical Briefs for Policy-Makers. WHO/EIP/HSF/PB/05.02. WHO, Geneva.
 Ernst, S., Judith, M., Noor, T., et al. (2012) The Impact of Health Insurance in Africa and Asia: A Systemic Review. Bulletin of the World Health Organization, 90, 685-692.
 Aghayere, V.O. (2002) Managing Human and Financial Resources for Health for All in Nigeria. Institute of Public Administration and Extension Services, University of Benin Edo State, Nigeria, 79-90.
 Uzochukwu, B.S.C. and Onwuzurike, B.K. (2001) Knowledge, Attitude and Practice of Family Planning amongst Women in a High Density Low Income of Enugu, Nigeria. Africa Journal of Reproductive Health, 5, 83-89.
 Smith, B.A. (1992) Health Insurance in Developing Countries: Lessons from Experience. Health Policy and Plannning, 7, 215-226.
 Katibi, I.A., Akande, A.A. and Akande, T.M. (2003) Awareness and Attitude of Medical Practitioners in Ilorin towards National Health Insurance Scheme. Nigerian Medical Practitioner, 43, 33-35.
 Airede, L.R. (2003) Implementing the National Health Insurance Scheme: the dawn of a new in health care financing in Nigeria. Sahel Medical Journal, 6, 1-5.
 Bhageerathy, R., Nair, N.S., Sabu, K.M. and Unnikrishnan, B. (2012) Awareness, Attitude and Their Correlates towards Health Insurance in an Urban South Indian Population. Management in Health, 16, 32-35.
 Owu, E., Ifatimehin, O.O. and Shaka, S. (2014) Assessment of the Level of Awareness of the Effectiveness of National Health Insurance Scheme among Workers in Kaduna Metropolis, Nigeria. Journal of Education and Policy Review, 6, 43-51
 Bhageerathy, R., Nair, N.S., Sabu, K.M. and Unnikrishnan, B. (2007) Awarenes of Health Insurance in a South Indian Population—A Community Based Study. Health and Population-Perspectives and Issues, 30, 177-188.
 Agba, A.M., Ushie, E.M. and Osuchukwu, N.C. (2010) National Health Insurance Scheme and Employees Access to Healthcare Services in Cross River State, Nigeria. Global Journal of Human Social, 10, 56-67.
 Onwujekwe, O.E., Uzochukwu, B.S., Ezeoke, O.P. and Uguru, N.P. (2011) Health Insurance: Principles, Models and the Nigerian National Health Insurance Scheme. International Journal of Medicine and Health Development, 16, 45-54
 Okaro, A.O., Ohagwu, C.C. and Njoku, J. (2010) Awareness and Perception of National Health Insurance Scheme among Radiographers in South East Nigeria. American Journal of Scientific Research, 2, 18-25.
 Olive, S., Thomas, R., Julia, L., Nompumelelo, Z.D., Pelisa, D. and Laetitia, R. (2006) Public Perception on National Health Insurance: Moving towards Universal Health Coverage in South Africa. South African Medical Journal, 96, 814-818.
 Onwujekwe, O.E., Okereke, E., Onoka, C., Uzochukwu, B.S.C., Kirigia, J. and Petu, A. (2010) Willingness to Pay for Community-Based Health Insurance in Nigeria: Do Economic Status and Place of Residence Matter? Health Policy and Planning, 25, 155-161.
 Babatunde, O.A., Akande, T.M., Salaudeen, A.G., Aderibigbe, S.A., Elegbede, O.E. and Ayodele, L.M. (2012) Willingness to Pay for Community Health Insurance and Its Determinants among Household Heads in Rural Communities in North-Central, Nigeria. International Review of Social Sciences and Humanities, 2, 133-142.
 Owumi, B.E., Adeoti, A.B. and Patricia, A.T. (2013) National Health Insurance Scheme Dispensing Outreach and Maintenance of Health Status in Oyo State. International Journal of Humanities and Social Science Invention, 2, 37-46.
 Asenso, O.W.K., Osei, A.I. and Anum, A. (1997) Willingness to Pay for Health Insurance in a Developing Economy. A Pilot Study of the Informal Sector of Ghana Using Contingent Evaluation. Health Policy, 42, 223-237.