Article (rosenthal1971ultra)
Rosenthal, E.
Plus ultra, non plus ultra, and the Columnar Device of Emperor Charles V
Journal of the Warburg and Courtauld Institutes,
1971, 34, 204-228
Article (rosenthal1973invention)
Rosenthal, E.
The Invention of the Columnar Device of Emperor Charles V at the Court of Burgundy in Flanders in 1516
Journal of the Warburg and Courtauld Institutes,
1973, 36, 198-230