John Boardman, Diana Scarisbrick, The Ralph Harari Collection Of Finger Rings, Thames And Hudson, 1977; Shirley Bury, An Introduction To: Rings, Victoria And Albert Museum, 1984; A. Ward, J. Cherry, C. Gere, B. Cartlidge, la Bague De L'antiquité À Nos Jours, Office Du Livre, 1981 (3)
