1.		Segmented Inbound Portugal Reports : Austria, Belgium, France, Germany, Ireland, Italy, Netherlands, Spain, Sweden, United Kingdom. / European Travel Monitor Data Publicação: 1997 Col.autor: European Travel Monitor
2.		Segmented Inbound Portugal Reports : Austria, Belgium, France, Germany, Ireland, Italy, Netherlands, Spain, Sweden, United Kingdom. / European Travel Monitor Data Publicação: 1997 Col.autor: European Travel Monitor