Edu, E. M., E. E. Edet, O. O. Asuquo, and A. E. Sylvester. “A Six- Year Review of Uptake of Bilateral Tubal Ligation (BTL) at a Tertiary Health Institution in Calabar, Calabar, Nigeria”. International Journal of Health Sciences, vol. 6, no. S3, Mar. 2022, pp. 1011-8, doi:10.53730/ijhs.v6nS2.5106.