“Comparison Between Sperm Preparation before Cryopreservation and Post-Thawing Sperm Preparation Using Density Gradient Centrifugation in Normozoospermic Semen Samples”. Journal of Infertility and Reproductive Biology, vol. 10, no. 2, June 2022, pp. 19-21, https://doormaj.com/index.php/jirb/article/view/69.