Dagron et al., p. 309. "…agreed to prolong the Byzantine-Mongol (Iranian) alliance."
Jackson, pp. 202–203. "From 1273 Michael allied with Noghai, giving him an illegitimate daughter in marriage and using him as a means to put pressure on Bulgaria."
Richard, p. 453. "The sustained attacks by the Sultan Baibars (…) rallied the Occidentals to this alliance [with the Mongols], to which the Mongols also convinced the Byzantines to adhere."