Bin, Kaio Jia, et al. “Correlation of Oxygen Consumption and Patient Day With Invasive Mechanical Ventilation in a Hospital in Sao Paulo During Covid-19 Pandemic”. International Journal of Innovative Research in Medical Science, vol. 6, no. 11, Nov. 2021, pp. 835-9, doi:10.23958/ijirms/vol06-i11/1266.