He made use of contemporary Italian humanists and historians who wrote on Skanderbeg such as Francescus Philephus (1389-1481), Johanes Jovianus Pontanus (1423-1503), Raffaele Maffei Volaterranus (1434-1516), while also using two Byzantine chroniclers, Laonikos Chalkokondyles (1423-1464) and George Sphrantzes (1401-1478).
[3] Fan Noli in his first work on Skanderbeg, Historia e Skënderbeut, mbretit të shqiptarëve, holds that Antivarino is an authentic source which Biemmi used.
[4] Athanas Gegaj, in his dissertation prepared for the University of Paris, defends Biemmi, saying that he gives us, through Antivarino, valuable information about Albanian society and its princes at the time.
[5] Fan Noli, in his PhD thesis for the University of Boston, George Castroiti Scanderbeg (1405-1468), regards Babinger's conclusions as unconvincing and furthermore argues that the wealth of information could not have been falsified.
[10] Rinaldina Russell of Queens College who holds PhD in Italian literature, states that Antivarino's work, provided by Biemmi, is more reliable than Barleti's.