Onoka, CA; Hanson, K; Mills, A; (2016) Growth of health maintenance organisations in Nigeria and the potential for a role in promoting universal coverage efforts. Social science & medicine (1982), 162. pp. 11-20. ISSN 0277-9536 DOI: https://doi.org/10.1016/j.socscimed.2016.06.018

Onoka, CA; (2014) The private sector in national health financing systems: the role of health maintenance organisations and private healthcare providers in Nigeria. PhD thesis, London School of Hygiene & Tropical Medicine. DOI: https://doi.org/10.17037/PUBS.02089174