The Bologna Stone: history's first persistent luminescent material Lastusaari, Mika ; Laamanen, Taneli ; Malkamäki, Marja ; Eskola, Kari O. ; Kotlov, Aleksei ; Carlson, Stefan ; Welter, Edmund ; Brito, Hermi F. ; Bettinelli, Marco ; Jungner, Högne ; Hölsä, Jorma Abstract Publication: European Journal of Mineralogy Pub Date: October 2012 DOI: 10.1127/0935-1221/2012/0024-2224 Bibcode: 2012EJMin..24..885L