LINKS http://www.isg.pthttp://www.inp.pthttp://www.ulusofona.pthttp://cicant.ulusofona.pt/index.php/our-research/present-research/27-mobserv-sistemas-facilitadoreshttp://www.iulm.it/http://www.unex.eshttp://www.portalcomunicacion.com/lecciones.asp?aut=42http://home.medewerker.uva.nl/a.a.vanruler/
