633
92. Barber, op. cit, pp. 169–170.
634
93. Strayer, op. cit, p. 158.
635
94. Ibid.
636
95. Ibid.
637
96. O'Shea, op. cit, pp. 239–246.
638
97. Sumption, op. cit, p. 235.
639
98. Barber, op. cit, p. 167.
640
99. Janet Hamilton and Bernard Hamilton, Christian Dualist Heresies in the Byzantine World C. 650–1405, Manchester University Press, Manchester, 1998, pp. 276–277.
