Refatovich, G. R., and D. O. Otabekovich. “Less-Known Phosphodiesterase Type 5 Inhibitors – New Solutions for the Therapy of Erectile Dysfunction”. International Journal of Integrative and Modern Medicine, vol. 2, no. 5, May 2024, pp. 318-22, https://medicaljournals.eu/index.php/IJIMM/article/view/383.