Francis Dvornik, The Slavs in European history and civilization, New Brunswick [u.a.], , 3rd. pbk. éd. (ISBN9780813507996, lire en ligne), 347
doi.org
dx.doi.org
A. Sorokowski, « Ukrainian catholics and orthodox in Poland since 1945 », Religion in Communist Lands, vol. 14, no 3, , p. 244–261 (DOI10.1080/09637498608431268)