“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” (2011) Pecvnia : Revista de la Facultad de Ciencias Económicas y Empresariales, Universidad de León, (13), pp. 25–58. doi:10.18002/pec.v0i13.602.