„Frequency of Hepatitis B and C Co-Infection in Chronic Liver Disease Patients in Calabar, Cross River State, Nigeria“ (2021) Nigerian Journal of Physiological Sciences, 31(1), str. 043–047. Dostupno na: https://www.ojshostng.com/index.php/njphysiologicalsciences/article/view/1851 (Pristupljeno: 6 travanj 2026).