1. Tovarnaya nomenklatura vneshneekonomicheskoy deyatel'nosti Respubliki Uzbekistan [Commodity nomenclature of foreign economic activity of the Republic of Uzbekistan]. Version.Tashkent (2017), 655p.
2. Zaginailov Yu.N., Theory of information security and methodology of information protection (Moscow, Direct-Media, 2015)
3. Andreev A.M., Berezkin D.V., Morozov V.V., Simakov K.V., Automatic classification of text documents using neural network algorithms and semantic analysis] [Electronic resource. SPC “INTELTECH PLUS”. http://www.inteltec.ru/publish/articles/textan/57_simakov.pdf.