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Preejith, S P; Alex, Annamol; Joseph, Jayaraj; Sivaprakasam, Mohanasankar (May 2016). "Design, development and clinical validation of a wrist-based optical heart rate monitor". 2016 IEEE International Symposium on Medical Measurements and Applications (MeMeA). Benevento, Italy: IEEE. pp. 1–6. doi:10.1109/MeMeA.2016.7533786. ISBN9781467391726. S2CID2344766.
Gillinov, Stephen; Etiwy, Muhammad; Wang, Robert; Blackburn, Gordon; Phelan, Dermot; Gillinov, A. Marc; Houghtaling, Penny; Javadikasgari, Hoda; Desai, Milind Y. (August 2017). "Variable Accuracy of Wearable Heart Rate Monitors during Aerobic Exercise". Medicine & Science in Sports & Exercise. 49 (8): 1697–1703. doi:10.1249/MSS.0000000000001284. ISSN0195-9131. PMID28709155. S2CID46847998.