Explorations in Ottoman Prehistory - Rudi Paul Lindner - Google Books

http://books.google.de/books?id=JMUAfa3GFVQC&pg=PA135&dq=gazi+wittek&lr=lang_de&as_brr=3&sig=auSMeKLJuhL3rosAJdBbZGuDRAk#PPA126,

The origins of the Ottomans, whose enterprise ruled much of the Near East for more than half a millennium, have long tantalized and eluded scholars, many of whom have thrown up their hands in exasperation. While the later fourteenth- and fifteenth-century…