Raymond of Aguilers, III, p. 25. Об укреплениях Никеи см.: A. Schneider and W. Karnapp, Die Stadtmauer von Iznik-Nicea (Berlin, 1938); C. Foss and D. Winfield, Byzantine Fortifications (Pretoria, 1986), pp. 79–121; R. Rogers, Latin Siege Warfare in the 12th Century (Oxford, 1992), pp. 17–25.
