1. Cristian Gatu is affiliated with the Department of Computer Science, University of Neuchâtel, Emile-Argand 11, CH-2007 Neuchâtel, Switzerland . Erricos John Kontoghiorghes is affiliated with the Department of Public and Business Administration, University of Cyprus, Cyprus, and the School of Computer Science and Information Systems, Birkbeck College, University of London, UK .