| 2007 | ENTER | Web-based Recommenders for Personalized City Tours: A Usage Analysis. | Ronny Kramer, Marko Modsching, Klaus ten Hagen, Ulrike Gretzel |
| 2007 | ENTER | Behavioural Impacts of Mobile Tour Guides. | Ronny Kramer, Marko Modsching, Klaus ten Hagen, Ulrike Gretzel |
| 2006 | ENTER | A Field Trial to Elicit Individual Preferences in the Context of a Mobile Dynamic Tour Guide. | Ronny Kramer, Marko Modsching, Klaus ten Hagen, Ulrike Gretzel |
| 2006 | ENTER | Capturing the Beaten Paths: A Novel Method for Analysing Tourists' Spatial Behaviour at an Urban Destination. | Marko Modsching, Ronny Kramer, Ulrike Gretzel, Klaus ten Hagen |
| 2006 | SAC | Field study on methods for elicitation of preferences using a mobile digital assistant for a dynamic tour guide. | Ronny Kramer, Marko Modsching, Klaus ten Hagen |
| 2005 | ISDA | A city guide agent creating and adapting individual sightseeing tours. | Klaus ten Hagen, Marko Modsching, Ronny Kramer |
| 2005 | MDM | Context driven, adaptive tour computation and information presentation. | Ronny Kramer, Marko Modsching, Joerg Schulze, Marcel Hermkes, Klaus ten Hagen |
| 2005 | Mobiquitous | A Location Aware Mobile Tourist Guide Selecting and Interpreting Sights and Services by Context Matching. | Klaus ten Hagen, Marko Modsching, Ronny Kramer |