1. Ankerst M., Braunmüller B., Kriegel H.-P., Seidl T.: Improving Adaptable Similarity Query Processing by Using Approximatios. Proc. 24th Int. Conf. on Very Large Databases (VLDB’98), New York, USA. Morgan Kaufmann (1998) 206–217
2. Ankerst M., Kriegel H.-P., Seidl T.: A Multi-Step Approach for Shape Similarity Search in Image Databases.IEEE Transactions on Knowledge and Data Engineering, Vol. 10, No. 6 (1998) 996–1004
3. Berchtold S., Böhm C., Braunmüller B., Keim D., Kriegel H.-P.: Fast Parallel Similarity Search in Multimedia Databases. Proc. ACM SIGMOD Int. Conf. on Management of Data, Tucson, AZ. ACM Press (1997) 1–12, Best Paper Award
4. Berchtold S., Böhm C., Keim D., Kriegel H.-P.: A Cost Model for Nearest Neighbor Search in High-Dimensional Data Spaces. Proc. 16th ACM SIGACT-SIGMODSIGART Symp. on Principles of Database Systems (PODS), Tucson, AZ (1997) 78–86
5. Berchtold S.: Geometry Based Search of Similar Mechanical Parts. Ph.D. Thesis, Institute for Computer Science, University of Munich.Shaker Verlag, Aachen (1997) in German