1. Leonard P, Beattie TF, Addison PS, Watson JN. Standard pulse oximeters can be used to monitor respiratory rate. Emergency Medical Journal 2003; 20:524–525.
2. Addison PS, Watson JN. Secondary Wavelet Feature Decoupling (SWFD) and its use in Detecting Patient Respiration from the Photoplethysmogram. 25th Annual International Conference of the IEEE Engineering in medicine and Biology Society, Cancun, Mexico; 17–21 September2003.
3. Addison PS, Watson JN. Secondary Transform Decoupling of Shifted Nonstationary Signal Modulation Components: Application to Photoplethysmography. International Journal of Wavelets, Multiresolution andInformation Processing 2004; 2: 43–57.
4. Leonard P.A., Grubb N.R., Addison P.S., Clifton D., Watson J.N. An algorithm for the detection of individual breaths from the pulse oximeter waveform. Journal of Clinical Monitoring and Computing.(In press.)
5. Aldroubi A. and Unser M., Wavelets in Medicine and Biology, CRC Press,Boca Raton, 1996.