TY JOUR TI System of legally protected interests in civil law KW system KW interest KW classification KW principles KW signs of the system KW subsystem KW right KW legitimate interest JO Vestnik of the St. Petersburg University of the Ministry of Internal Affairs of Russia AU Maximov, V.A. PY 2019 IS 2019 PB SAINT-PETERSBURG UNIVERSITY OF THE MINISTRY OF INTERNAL AFFAIRS OF THE RUSSIAN FEDERATION