Velichko, D. A. The principle ex-officio in the fight against the illegal movement of IP objects in the Republic of Belarus / D. A. Velichko ; scientific adv. O. V. Morozova // Proceedings of the IV-the Republican Youth Scientific-practical Conference “i-Customs.by” [Electronic resource] : Minsk, 24 May 2021 / compilers: E. S. Goloubtsova, A. N. Shavel, A. Y. Zhevlakova. – Minsk : BNTU, 2021. – P. 23-26.