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Books about Cerularius:
And taking bread: Cerularius and the azyme controversy of 1054 (Theologie historique) by Mahlon H Smith (1978)
And Taking Bread... Cerularius and the Azyme Controversy of 1054 by Mahlon H. Smith (1978)
The Schism of Michael Cerularius in 1054 by Venance Grumel (1954)
And taking bread ... : Cerularius and the azyme controversy of 1054 by Mahlon H. Smith (1978)
Wiki information Cerularius:
Michael I Cerularius or Keroularios was the Ecumenical Patriarch of Constantinople from 1043 to 1059.