Romano A. (2013). "A preliminary contribution to the study of phonetic variation of /r/ in Italian and Italo-Romance". In: L. Spreafico & A. Vietti (eds.), Rhotics. New data and perspectives. Bolzano/Bozen: BU Press, 209–225 [1]Archived 1 February 2016 at the Wayback Machine
Romano A. (2013). "A preliminary contribution to the study of phonetic variation of /r/ in Italian and Italo-Romance". In: L. Spreafico & A. Vietti (eds.), Rhotics. New data and perspectives. Bolzano/Bozen: BU Press, 209–225 [1]Archived 1 February 2016 at the Wayback Machine