1. Collection of Ancient Greek and Roman Art, Ny Carlsberg Glyptotek, Copenhagen, Denmark
2. Museum of Fine Arts, Boston, MA, USA
3. Department of Scientific Research, British Museum, London, UK
4. Heritage Science Laboratory, University of Ljubljana, Ljubljana, Slovenia
5. Globe Institute, University of Copenhagen, Copenhagen, Denmark
6. Haldor Topsøe A/S, Copenhagen, Denmark
7. Laboratory for Ion Beam Physics, ETH Zürich, Zürich, Switzerland
8. Chemtech Institute, School of Engineering and Architecture of Fribourg, HES-SO, Fribourg, Switzerland