↑ Dodd, JS (1801). The Traveller's Director Through Ireland: Being a Topographical Description ... of All the Roads ... Several Cities, Towns ... And an Epitome of the Ecclesiastical, Civil, Military and Natural History of Ireland, from the Earliest Accounts to the Present Years : Compiled from the Most Authentic Authorities . J. Stockdale. p. 74.
↑ Gillerman, David M. (1999). "コスモポリタニズムとカンパニリスモ：シエナ大聖堂のファサードにおけるゴシックとロマネスク" . The Art Bulletin . 81 (3): 437– 455. doi : 10.2307/3051351 . ISSN 0004-3079 .
