1. Biagi L, Negretti M (2004) Environmental thematic maps prediction and easy probabilistic classification. Trans GIS 8(2):263–274, Plate~21
2. Biagi L, Brovelli MA, Campi A, Cannata M, Carcano L, Credali M, De Agostino M, Manzino A, Sansò F, Siletto G (2011) Ilprogetto HELI-DEM (Helvetia-Italy digital elevation model): scopi e stato di attuazione. Bollettino SIFET 1/2011
3. Biagi L, Carcano L, De Agostino M (2012) DTM cross validation and merging: problems and solutions for a case study whithin the Heli-DEM project. Int Arch Photogramm Remote Sens Spatial Inf Sci XXXIX-B4
4. Biagi L, Carcano L, Lucchese A, Negretti M (2013) Creation of a multiresolution and multiaccuracy DTM: problems and solutions for a case study. ISPRS Archives, vol XL-5/W3, WG V/3. The role of geomatics in hydrogeological risk, 27–28 February 2013, Padua, pp 63–71
5. Boucher C, Altamimi Z (2011) Memo: specifications for reference frame fixing in the analysis of a EUREF GPS campaign, Version~8.
http://etrs89.ensg.ign.fr/memo-V8.pdf