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

Learning project planning the agile way. - Frank Keenan; Sarah Powell; Gerry Coleman; Kevin McDaid (ITiCSE, 2006)