Youngsabanant, M., and S. Rabiab. “Potential effect of porcine follicular fluid (pFF) from small-, medium-, and large-sized ovarian follicles on HeLa cell line viability”. Science, Engineering and Health Studies, vol. 14, no. 2, Aug. 2020, pp. 141-5, doi:10.14456/sehs.2020.13.