Гапонов ОО. THEORETICAL AND LEGAL CHARACTERISTICS OF INSTITUTIONAL AND SPECIAL PRINCIPLES OF ADMINISTRATIVE AND LEGAL SERVICES PROVIDED BY THE STATE MIGRATION SERVICE OF UKRAINE. kyivchasprava [Internet]. 2022Apr.22 [cited 2024May17];(4):172-8. Available from: http://kyivchasprava.kneu.in.ua/index.php/kyivchasprava/article/view/97