Sergey V. Ryazantsev, Marina N. Khramova, и Anna I. Tyshkevich. «BACKGROUND AND FACTORS OF MUSLIM IMMIGRATION TO THE COUNTRIES OF THE EUROPEAN UNION». «Вестник НАН РК», вып. 2, апрель 2021 г., сс. 220-8, https://journals.nauka-nanrk.kz/bulletin-science/article/view/224.