https://amslaurea.unibo.it/id/eprint/29008/
La Spergola: interpretazioni enologiche di un vitigno versatile nel territorio dei Colli di...
https://fringewine.blogspot.com/2012/09/spergola-emilia-romagna-italy.html
Fringe Wine: Spergola - Emilia-Romagna, Italy
A blog devoted to exploring wines made from unusual grape varieties and/or grown in unfamiliar regions all over the world.
emilia romagnafringewinespergolaitaly
https://www.spergola.com/
Compagnia della Spergola
compagniadellaspergola