Khandanpour, Nader, Armon, Matthew P., Jennings, Barbara, Clark, Allan and Meyer, Felicity J. (2009) Photoplethysmography, an easy and accurate method for measuring ankle brachial pressure index: Can photoplethysmography replace doppler. Vascular and Endovascular Surgery, 43 (6). pp. 578-582. ISSN 1538-5744