I will not attempt search out bibliography on the many "Flemish" artists in GV's Vite. I will instead post titles dealing with his writing on this subject, and related topics.
Aislinn Loconte. "The North looks South: Giorgio Vasari and early Modern visual culture in the Kingdom of Naples." Art History. Vol. 31, no. 4 (September, 2008): 438-459.
Laura Camille Agoston. "Male/Female, Italy/Flanders, Michelangelo/Vittoria Colonna." Renaissance Quarterly. Vol. 58, No. 4 (Winter, 2005): 1175-1219.
Mark Evans. "Duerer and Italy Revisited." Online article from online Occasional Paper number 130 (2004) from the British Museum celebrating Albrecht Duerer.
Lisa Pon. Raphael, Duerer, and Marcantonio Raimondi: copying and the Italian Renaissance print. New Haven, 2004.
Marc Gotlieb. "The Painter's Secret: Invention and Rivalry from Vasari to Balzac." The Art Bulletin. Vol. 84, No. 3 (September, 2002): 469-490.
Paula Nuttall. "The Medici and Netherlandish painting." In: The Early Medici and Their Artists. Ed. by Francis Ames-Lewis. London, 1995: 135-152. Especially rich in sources.
Walter S. Gibson. "Bosch's Dreams: A Response to the Art of Bosch in the Sixteenth Century." The Art Bulletin. Vol. 74, No. 2 (June, 1992): 205-218.
Larry Silver. "The State of Research in Northern European Art of the Renaissance Era." The Art Bulletin. Vol. 68, No. 4 (December, 1986): 518-535.
E. Howe. "Architecture in Vasari's 'Massacre of the Huguenots'." Journal of the Warburg and Courtauld Institutes. Vol. 39, (1976): 258-261.
Morton H. Bernath. "Notes on Justus van Ghent." American Journal of Archaeology: the Archaeological Institute of America. Vol. XIV, no. 3 (1910): 331-336.
Dutch and Flemish Artists in Rome, 1500–1600. From the Metropolitan Museum of Art, New York City.
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