Діденко, С.В. and Мкртчян, Р.С. 2019. THEORY AND HISTORY OF ADMINISTRATIVE SERVICES IN UKRAINE. Scientific works of National Aviation University. Series: Law Journal "Air and Space Law". 2, 51 (Jun. 2019), 70–76. DOI:https://doi.org/10.18372/2307-9061.51.13781.