“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), hlm. 043–047. Tersedia pada: https://www.ojshostng.com/index.php/njphysiologicalsciences/article/view/1851 (Diakses: 8 Juli 2026).