Blinc, A., J. Buturović Ponikvar, and Z. Fras. “The Prevalence of COVID-19 Among Health Care Personnel in a University Hospital by the End of 2020, and Ambient Air CO2 in Hospital Rooms Ventilated by Window-Opening in 2021/22”. Strojniški Vestnik - Journal of Mechanical Engineering, vol. 68, no. 4, Apr. 2022, pp. 265-71, doi:10.5545/sv-jme.2022.64.