See:
- Laura Soro, Alessandro Usai, Between necessity and economy: the archaeological field excavation at Gribaia (Sardinia, ITALY). A photogrammetrical solution to document a small archaeological heritage.- https://www.academia.edu/371063
- G. Bertorino, M. Franceschelli, Carlo Lugliè, Columbu S., Marco Marchi : Petrographic characterisation of polished stone axes from Neolithic Neolithic Sardinia: archaeological implications,,in: Periodico di Mineralogia January 2002, pp. 87-100 - https://www.academia.edu/30075890
- http://www.archaeologicaltraces.org/index.php/2014-01-28-09-56-01/traces-in-time/30-tit-2-2012/46-tit0006