1. M.M.A. Hashem, R. Shams, M.A. Kader, M.A. Sayed, Design and development of a heart rate measuring device using fingertip. Department of Computer Science and Engineering, Khulna University of Engineering and Technology (KUET), Khulna 9203, Bangladesh (2010)
2. S. Allender, V. Peto, P. Scarborough, A. Boxer, M. Rayner, Coronary heart disease statistics. British Health Promotion Research Group, Heart Foundation Department of public health, University of Oxford (2007)
3. M. Fezari, M. Bousbia-Salah, M. Bedda, Microcontroller based heart rate monitor. Int. Arab. J. Inf. Technol. 5(4) (2008)
4. D. Ibrahim, K. Buruncuk, Heart rate measurement from the finger using a low-cost microcontroller (2002),
http://www.emo.org.tr/ekler/a568a2aa8c19a31_ek.pdf
5. B. Boashash, Time-Frequency signal analysis and processing: a comprehensive reference (Oxford, Elsevier Science, 2003)