Бела од Мачве — разлика између измена

* {{Cite book |ref= harv|last=Fine|first=John Van Antwerp|authorlink=Џон ван Антверп Фајн|title=The Late Medieval Balkans: A Critical Survey from the Late Twelfth Century to the Ottoman Conquest|url=httphttps://books.google.com/books?id=LvVbRrH1QBgC|year=1994|publisher=University of Michigan Press|isbn=978-0-472-08260-5}}