Carneiro, Rodrigo Lima, et al. “Effects of Nitrous Oxide on Cardiovascular Parameters in Pigs Anesthetized With Propofol and Subjected to Pressure-Controlled Ventilation”. Semina: Ciências Agrárias, vol. 38, no. 4, Aug. 2017, pp. 2209-14, doi:10.5433/1679-0359.2017v38n4p2209.