Analysis of information sources in references of the Wikipedia article "Osman Ier" in French language version.
* Heath Lowry, The Nature of the Early Ottoman State, SUNY Press, , 197 p. (ISBN 0-7914-5636-6, lire en ligne), p. 78« That they hailed from the Kayı branch of the Oğuz confederacy seems to be a creative "rediscovery" in the genealogical concoction of the fifteenth century. It is missing not only in Ahmedi but also, and more importantly, in the Yahşi Fakih-Aşıkpaşazade narrative, which gives its own version of an elaborate genealogical family tree going back to Noah. If there was a particularly significant claim to Kayı lineage, it is hard to imagine that Yahşi Fakih would not have heard of it. »
« Based on these charters, all of which were drawn up between 1324 and 1360 (almost one hundred fifty years prior to the emergence of the Ottoman dynastic myth identifying them as members of the Kayı branch of the Oguz federation of Turkish tribes), we may posit that... »
