| The problem of Ottoman origins has preoccupied students of history, but because of both the absence of contemporary source materials and conflicting accounts written subsequent to the events there seems to be no basis for a definitive statement | |
|---|---|
| Encyclopedia of the Ottoman Empire | Southeastern Europe under Ottoman rule, 1354-1804, By Peter F |
: Katasterhefte Bursas , S.
27| No source provides a firm and factual recounting of the deeds of Osman's father | |
|---|---|
.