1. University of Seville, ETS de Ingeniería Informática, Web Engineering and Early Testing Research Group, Seville, Spain, --- Select a Country ---
2. Soltel Group, Department of Research and Development, Leonardo da Vinci, 13, 41092 Seville, Spain, --- Select a Country ---
3. School of Banking and Management, Cracow, Poland, --- Select a Country ---
4. School of Computer Science, Madrid Open University, UDIMA, Madrid, Spain, --- Select a Country ---