1. Murphy Surveys, Kilcullen, Co.; Kildare Ireland
2. Geoservice, Geological & Geophysical Consultants; 35, Lykaiou St Athens Greece
3. Department of Strength of Materials and Structural Engineering; EUETIB/CEIB; Polytechnic University of Catalonia; C/Urgell Barcelona 187, 08036 Spain
4. Second Ephorate of Prehistoric and Classical Antiquities; Greece