1. Unit for Surveying and Geoinformation, Faculty of Engineering ScienceUniversity of Innsbruck Innsbruck Austria
2. National Laboratory for Civil EngineeringApplied Geodesy Division Lisbon Portugal
3. Unit for Engineering Mathematics, Faculty of Engineering ScienceUniversity of Innsbruck Innsbruck Austria
4. National Laboratory for Civil EngineeringConcrete Dams Department Lisbon Portugal