@ARTICLE{KozlovaRitterReimer2006, author = {Iryna Kozlova and Norbert Ritter and Olga Reimer}, title = {Towards Integrated Query Processing for Object-Relational and XML Data Sources.}, journal = {Proc. of the 10th International Database Engineering & Application Symposium (IDEAS 2006), IEEE Computer Society 2006}, year = {2006}, pages = {295-300} }