1. Mesarovich, M., Takahara, Y.: General system theory: mathematical foundations. In: Mathematics in Science and Engineering, vol. 113. Academic Press, New York, San Francisco, London (1975)
2. Maltcev, A.I.: Algebraic Systems, 392 p. Moscow, Nauka (1970) (in Russian)
3. Kurosh, A.G.: Theory of Groups, 648 c. Moscow, Nauka (1967) (in Russian)
4. Serdyukova, N.A.: On Generalizations of Purities, Algebra & Logic, 30, № 4, pp. 432–456 (1991)
5. Serdyukova, N.A.: Optimization of Tax System of Russia, parts I and II. Budget and Treasury Academy, Rostov State Economic University (2002). (in Russian)