1. Anders, K.H. Level of detail generation of 3D building groups by aggregation and typification.Proceedings of the XXII international cartographic conference. A Coruña Local Organizing Committee Produced by Global Congresos and V. Lemp, CD ISBN 0-958-46093-0. July11–162005, A Coruna, Spain.
2. Bandrova, T. Bulgarian cartography: from paper to virtual reality. 3rd international conference on cartography and GIS, CD proceedings. Nessebar, Bulgaria. pp.1314–0604. ISSN.
3. Bandrova, T. and Bonchev, S. 3D maps for internet application. 3rd ISDE digital earth summit, CD proceedings. June12–14, Nessebar, Bulgaria. ISBN: 978–954–724–039–1