Carvalho, Marília Daniela Ferreira, et al. “Sildenafil As a Vasodilatatory Madiator in the Treatment of Abdominal Sepsis”. JOURNAL OF SURGICAL AND CLINICAL RESEARCH, vol. 2, no. 2, June 2012, pp. 78-86, doi:10.20398/jscr.v2i2.1953.