Keller, C., Brimacombe, J., Hoermann, C., Loekinger, A., and Kleinsasser, A. (2005) Pressure support ventilation with the ProSeal® laryngeal mask airway. A comparison of sevoflurane, isoflurane and propofol. European Journal of Anaesthesiology, 22 (8). pp. 630-633.

Keller, Christian, Brimacombe, Joseph, Boehler, Michael, Loeckinger, Alexander, and Puehringer, Friedrich (2002) The influence of cuff volume and anatomic location on pharyngeal, esophageal, and tracheal mucosal pressures with the esophageal tracheal combitube. Anesthesiology, 96 (5). pp. 1074-1077.