1. Balmino, G., Vales, N., Bonvalot, S., and Briais, A., 2012. Spherical harmonic modelling to ultra-high degree of Bouguer and isostatic anomalies. Journal of Geodesy, 86, 499–520.
2. Baltsavias, E. P., 1999. A comparison between photogrammetry and laser scanning. ISPRS Journal of Photogrammetry and Remote Sensing, 54, 83–94.
3. El-Sheimy, N., Valeo, C., and Habib, A., 2005. Digital Terrain Modeling: Acquisition, Manipulation and Applications. Norwood: Artech House.
4. Hirt, C., Rexer, M., 2015. Earth 2014: 1 arc-min shape, topography, bedrock and ice-sheet models - available as gridded data and degree-10,800 spherical harmonics. International Journal of Applied Earth Observation and Geoinformation, 39, 103–112.
5. Hutchinson, M. F., and Gallant, J. C., 2005. Representation of terrain. In Longley, P. A., et al. (eds.), Geographical Information Systems: Principles, Techniques, Management and Applications. Hoboken: John Wiley and Sons.