found: His Giambologna, c1984:p. 3 (b. 1529; d. 1608) p. 34 (Gian Bologna)
found: Dizionario biograf. degli italiani, 1969(Jean Boulogne, Giovanni Bologna, Giambologna)
found: Encic. ita.(Giambologna)
found: New century Ital. Ren. Enc., 1972:p. 441 (Giambologna, Giovanni da Bologna, John of Boulogne)
found: Bénézit, E. Dict. crit. et doc. ... c1976(Jean Bologne, Jean Boulongne, Jean Boullongne, Giambologna)
found: Il Giambologna a Firenze, 2009:title page (Giambologna)
found: Wikipedia, September 5, 2014(Giambologna; born Jean Boulogne; 1529-August 1608; sculptor known for marble and bronze statuary in late Renaissance and Mannerist style; born in Douai, Flanders (now in France); moved to Italy in 1550; died in Florence)