Erbabacan, E., G. M. Köksal, B. Ekici, G. Kaya, and F. Altındaş. “Effects of Different Modes of Ventilation and Head Position on the Size of the Vena Jugularis Interna”. Swiss Medical Weekly, vol. 144, no. 1920, May 2014, p. w13946, doi:10.4414/smw.2014.13946.