1. Solar potential for water heating explored by GIS;Voivontas;Solar Energy,1998
2. European Commission. European Solar Industry Federation. Sun in Action. ALTENER Programme, 1996.
3. GIS management of solar resource data;Sorensen;Solar Energy Materials and Solar Cells,2001
4. Greek Solar Industry Association—GSIA. Proceedings of the 3rd Seminar on Solar Energy—Active Systems, 1990 (in Greek).