Lambers, K. and M. Sauerbier. A Data Model for a GIS-based analysis of the Nasca Lines at Palpa (Peru) in Proceedings of the XIXth International Symposium, CIPA 2003: new perspectives to save cultural heritage: Antalya (Turkey), 30 September-04 October, 2003. Altan, M. Orhan ed. CIPA 2003 Organising Committee (2003): 713-718

Lambers, K. and M. Sauerbier. A Data Model for a GIS-based analysis of the Nasca Lines at Palpa (Peru) in Proceedings of the XIXth International Symposium, CIPA 2003: new perspectives to save cultural heritage: Antalya (Turkey), 30 September-04 October, 2003. Altan, M. Orhan ed. CIPA 2003 Organising Committee (2003): 713-718