C. D. A. de Oliveira-Costa, G. Friedman, S. R. R. Vieira, and L. Fialkow, “Pulse pressure variation and prediction of fluid responsiveness in patients ventilated with low tidal volumes”, Clinics, vol. 67, no. 7, pp. 773–778, Jul. 2012, doi: 10.6061/clinics/2012(07)12.