N B S ABORYAG, et al. “SILDENAFIL ALLEVIATES INSULIN SENSITIVITY VIA ATTENUATING OXIDATIVE STRESS AND PROINFLAMMATORY CYTOKINE PRODUCTION IN DIABETIC RATS”. International Journal of Pharma and Bio Sciences, vol. 4, no. 4, Dec. 2013, pp. 427-36, https://ijpbs.net/index.php/journal/article/view/2886.