Fathy WM, S. Farag R, El Nawawy M, Atiaa H, Mahdy T. High Performance Liquid Chromatography Method to Detect Tramadol and Sildenafil in the Blood of Rats on Combination Treatment. IJCT [Internet]. 2013 Nov. 5 [cited 2024 Nov. 26];11(6):2682-90. Available from: https://rajpub.com/index.php/ijct/article/view/3043