Mhanna, O. . “Mogul European Communications Between the Years ( 643/650) AH _(1245/1253)AD The Aim and the Reasons of Failure”. Tishreen University Journal- Arts and Humanities Sciences Series, vol. 39, no. 4, Aug. 2017, https://journal.tishreen.edu.sy/index.php/humlitr/article/view/3066.