Anatolievich Ostanin, Vladimir, Viktor Aleksandrovich Kosenko, and Zlata Vladimirovna Glukhova. 2018. “Discretionary Principles of Management: Justification of Practical Application in the Customs Service”. International Journal of Engineering & Technology 7 (4.38): 375-78. https://doi.org/10.14419/ijet.v7i4.38.24585.