Mladen Berekovic Ulta-Low-Power Wireless Sensor Node Design on 100 uW Scavenging Energy for Applications In Biomedical Monitoring. 16-18 2007 DSD http://dx.doi.org/10.1109/DSD.2007.4341444 conf/dsd/2007 db/conf/dsd/dsd2007.html#Berekovic07