İznik İmparatorluğu: Revizyonlar arasındaki fark

;Genel

* {{cite book | title = The New Cambridge Medieval History: C.1198-c.1300 | last = Abulafia | first = David | year = 1995 | volume = 5 | publisher = [[Cambridge University Press]] | url = https://books.google.nl/books?id=bclfdU_2lesC&pg=PA547&dq=1221+theodore+laskaris+I+died&hl=nl&sa=X&ei=KbdfVdCTC4euswG39IHwAg&ved=0CB0Q6AEwAA#v=onepage&q=1221%20theodore%20laskaris%20I%20died&f=false | isbn = 052136289X | ref=harv}}