[IEEE 2009 Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Minneapolis, MN (2009.09.3-2009.09.6)] 2009 Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Time-frequency representation of cardiovascular signals during handgrip exerciseTiinanen, S.; Kiviniemi, A.; Tulppo, M.; Seppanen, T. · 2009