Zeimpekis, V., Kourouthanassis, P.; and Giaglis. G. M. (2007)
In Bellavista, P. (Ed.). Telecommunication Systems and Technologies, UNESCO Encyclopaedia of Life Support Systems (EOLSS). EOLSS Publishers Co Ltd, Volume 6.108
In Doukidis G. J., Vrechopoulos, A. (Eds), Consumer Driven Electronic Transformation: Apply New Technologies to Enthuse Consumers, Springer-Verlag, US, ISBN 3-540-22611-7