Currently, Cristina Matos, 3 ECT, University of Trás-os-Montes e Alto Douro (UTAD), Apartado 1013, 5001-801 Vila Real, Portugal. His international experience includes various programs, contributions and participation in different countries for diverse fields of study.  His research interests reflect in his wide range of publications in various national and international journals.  He is the Editorial Board Member of many Journals and serves as a member of various associations, apart from being an author for many books.