Bekakos, M.P.
Department of Electrical & Computer Engineering,
School of Engineering,
Democritus University of Thrace,
Xanthi 67100, Thrace, GREECE
email: anairetis@gmail.com

Sambandham, M
Professor, Division of Mathematics and Computer Science,
Morehouse College, Atlanta, GA 30314, USA
email: msambandham@yahoo.com