Muzaffar, S., Shukla, N., Srivastava, A., Angelini, G. D., & Jeremy, J. Y. (2005). Sildenafil citrate and sildenafil nitrate (NCX 911) are potent inhibitors of superoxide formation and gp91(phox) expression in porcine pulmonary artery endothelial cells.

Muzaffar, Saima, Nilima Shukla, Amit Srivastava, Gianni D. Angelini, and Jamie Y. Jeremy. Sildenafil Citrate and Sildenafil Nitrate (NCX 911) Are Potent Inhibitors of Superoxide Formation and Gp91(phox) Expression in Porcine Pulmonary Artery Endothelial Cells. 2005.

Muzaffar, Saima, et al. Sildenafil Citrate and Sildenafil Nitrate (NCX 911) Are Potent Inhibitors of Superoxide Formation and Gp91(phox) Expression in Porcine Pulmonary Artery Endothelial Cells. 2005.