Genealogie medievali di Sardegna @ page 109
The cited information was published by Publicazione della Deputazione di Storia Patria per la Sargena, 1983 (Ref: page 109) The author/originator was L. L. Brook et al., Editors. This citation is considered to be direct and primary evidence used, or by dominance of the evidence.
Genealogie medievali di Sardegna.