Extrait de Sava Tekelija: "Carte de la Serbie ... 1805"
<a href="https://en.wikipedia.org/wiki/Sava_Tekelija" class="extiw" title="w:Sava Tekelija">Sava Tekelija</a>
Gaston Gravier (1919). <a rel="nofollow" class="external text" href="https://archive.org/stream/lesfrontireshi00grav">Les frontières historiques de la Serbie</a>.