Sergey V. Ryazantsev, Marina N. Khramova, и Anna I. Tyshkevich. 2021. «BACKGROUND AND FACTORS OF MUSLIM IMMIGRATION TO THE COUNTRIES OF THE EUROPEAN UNION». «Вестник НАН РК», вып. 2 (апрель):220-28. http://89.250.84.46/bulletin-science/article/view/224.