on the 'Angle' and 'Distance' Axioms. Journal of the Warburg and Courtauld Institutes (The Warburg Institute). 1988, 51: 190–196 [2010-10-16]. doi:10.2307/751275
The Taddei Tondo: A Frightened Jesus?. Journal of the Warburg and Courtauld Institutes (Warburg Institute). 1969, 32: 391–393. JSTOR 750622. S2CID 192330799