↑ The Columbia history of the world by John Arthur Garraty, Peter Gay: "The Greek empire in exile at Nicaea proved too strong to be driven out of Asia Minor, and in Epirus another Greek dynasty defied the intruders."
1 2 A Short history of Greece from early times to 1964 By W. A. Heurtley, H. C. Darby, C. W. Crawley, C. M. Woodhouse page 55"There in the prosperous city of Nicea, Theodoros Laskaris, the son in law of a former Byzantine Emperor, establish a court that soon become the Small but reviving Greek empire.
