Biography.com: Bessarion, John
Very brief article describing the life of this 15th-century scholar.
Johannes Bessarion
Article from the Catholic Encyclopedia on this 15th-century Byzantine scholar, by U. Benigni.
Johannes Bessarion
Wikipedia article, drawn from the 1911 Encyclopedia Britannica.
Letter of Recommendation for Pietro del Sacco of V
Partial Latin text and description of this manuscript written for Bessarion by his secretary.