An article titled : “ Pulse Estimation - A Frequency Domain Approach ” by Sandra Dias and Anibal Ferreira , of the Department of Electrical and Computer Engineering , University of Porto - Faculty of Engineering , Porto , Portugal , published on the World Wide Web in www . ortra . com / events / Portals / 16 / Dias % 20 et % 20 al _ AfekaConfSP 2014 . pdf ;