Il Fenomeno Abachistico a Supporto Dei Cambiamenti Socio-Economici: Arezzo Tra Il XIII Ed Il XVI Secolo = The Role of the Abacus Tradition for the Economic and Social Development of the Society: Evidence from Tuscany (Italy) Between XIII and XVI Century. Pecvnia 2011, No. 13, 25-58. https://doi.org/10.18002/pec.v0i13.602.