1.		Yield management in small and medium-sized enterprises in the tourism industry : general report / drawn up by Arthur Andersen [for] European Commission, DG XXIII Data Publicação: 1997 Resp- Sec.: Andersen, Arthur Col.autor: Comunidade Europeia. Comissão COTA(S): 6699
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 COTA(S): 17617.1