1. Alms A., Balovnev O., Breunig M., Cremers A.B., Jentzsch T., Siehl A. (1998): Space-Time Modelling of the Lower Rhine Basin Supported by an Object-Oriented Database, in: Physics and Chemistry of the Earth, Vol. 23, No. 3, pp. 251–260.
2. Balovnev O., Bergmann A., Breunig M., Shumilov S. (1999): Remote Access to Active Spatial Data Repositories. In: Proceedings of the First International Workshop on Telegeoprocessing (TeleGeo’99), Lyon-Villeurbanne, France, pp. 125–130.
3. Balovnev O., Bergmann A., Breunig M., Cremers A.B. & Shumilov S. (1998): A CORBA-based approach to Data and Systems Integration for 3D Geoscientific Applications. In: Proceedings of the 8th Intern. Symposium on Spatial Data Handling (SDH’98), Vancouver, Canada, pp. 396–407.
4. Lect Notes Comput Sci;O. Balovnev,1997
5. Beckmann N., Kriegel H.-P., Schneider R., Seeger B. (1990): The R*-tree: an efficient and robust access method for points and rectangles. In: Proceedings of ACM SIGMOD, Atlantic City, N.Y., pp. 322–331.