Benchmarking Tourism Destinations in the European Union. - Britta Oertel; Sie Liong Thio; Thomas Feil (ENTER, 2001)

Benchmarking Information and Communication Applications for the Purpose of Marketing and Sales in the Tourism Sector. - Britta Oertel; Thomas Feil; Sie Liong Thio (ENTER, 2002)

Mobile Multimedia Services for Tourism. - Britta Oertel; Karlheinz Steinmüller; Matthias Kuom (ENTER, 2002)

Accessibility of Tourism Web Sites Within The European Union. - Britta Oertel; Clemens Haße; Mandy Scheermesser; Sie Liong Thio; Thomas Feil (ENTER, 2004)