El-Mahmoudy, Abubakr M., Saad M. Shousha, Hussein Abdel-Maksoud, and Omayma AbouZaid. 2013. “Effect of Long-Term Administration of Sildenafil on Lipid Profile and Organ Functions in Hyperlipidemic Rats”. Acta Biomedica Atenei Parmensis 84 (1): 12-22. https://mattioli1885journals.com/index.php/actabiomedica/article/view/2466.