Nikolaus Backes, Kardinal Simon de Brion (Breslau) 1910, used by H.K. Mann and J. Hollnsteiner, The Lives of the Popes in the Middle Ages XVI (London) 1932: 171–205., both quoted by Kay, Richard (1965). “Martin IV and the Fugitive Bishop of Bayeux”. 《Speculum》 40 (3): 460–483 [p. 461f.] doi:10.2307/2850920. JSTOR2850920.
jstor.org
Nikolaus Backes, Kardinal Simon de Brion (Breslau) 1910, used by H.K. Mann and J. Hollnsteiner, The Lives of the Popes in the Middle Ages XVI (London) 1932: 171–205., both quoted by Kay, Richard (1965). “Martin IV and the Fugitive Bishop of Bayeux”. 《Speculum》 40 (3): 460–483 [p. 461f.] doi:10.2307/2850920. JSTOR2850920.
