Esophageal pulse oximetry utilizing reflectance photoplethysmography. - Panayiotis A. Kyriacou; Sarah Powell; Richard M. Langford; Deric P. Jones (IEEE Trans. Biomed. Eng., 2002)

Filtering techniques for the removal of ventilator artefact in oesophageal pulse oximetry. - Kamran Shafqat; Deric P. Jones; Richard M. Langford; Panayiotis A. Kyriacou (Medical Biol. Eng. Comput., 2006)