Jonzon , A., J. A. Tantalean, T. Norsted, and G. Sedin. “Airway Pressures During Positive-Pressure Ventilation With Superimposed Oscillations”. Upsala Journal of Medical Sciences, vol. 95, no. 1, Sept. 1990, pp. 53-61, doi:10.3109/03009739009178576.