Hamilton, S.  (2019).  Liturgy and Episcopal Authority. The Evidence of the Noyon Sacramentary (London, British Library, Additional MS 82956, formerly Phillipps MS 3340). In S.  Vanderputten & Meijns, B. L. I. (Red.), Bishops in the Long Tenth Century. Episcopal Authorities in France and Lotharingia, c. 900-c. 1050 (Vol. 6, pp. 139-157). Turnhout: Brepols.