Analysis of information sources in references of the Wikipedia article "Kasım Pasha" in English language version.
Jefferson, John (2012). The Holy Wars of King Wladislas and Sultan Murad: The Ottoman-Christian Conflict from 1438-1444. BRILL. ISBN 978-90-04-21904-5.(12 May 1442–30 April 1443 ad) Şehabeddin is listed as beylerbey, a position which he held until his defeat by Hunyadi in 1442 whereupon he was replaced as beylerbey by Kasım Pasha... he thus succeeded Şehabeddin in both offices.
The combined host met Ottoman forces first on November 3, 1443, between the castle of Bolvan (near Aleksinac) and the city of Niš. Here Kasim Bey, then governor of Rumelia, Ishak Bey and other standard bearers were defeated.
In the course of their flight Kasım and Turahan burned all villages between Niš and Sofia.
Успео је да дође у везу са Турахан Бегом и да га убеди (златом вероватно) да у боју не узме учешће, а све играјући на међусобну нетрпељивост Турахан бега и главнокомандујућег Касим бега.
In the course of their flight Kasım and Turahan burned all villages between Niš and Sofia.