1. Serdyukova, N., Serdyukov, V., Neustroev, S.: Testing as a feedback in a smart university and as a component of the identification of smart systems. In: Uskov, V., Howlett, R., Jain, L. (eds.) Smart Innovation, Systems and Technologies, SIST, vol. 144, pp. 527–538. Springer (2019)
2. Serdyukova, N., Serdyukov, V., Slepov, V.: Smart education analytics: quality control of system links. In: Uskov, V., Howlett, R., Jain, L. (eds.) Smart Innovation, Systems and Technologies, SIST, vol. 99, pp. 104–113. Springer (2018)
3. Mal’tsev, A.: The undecidability of the elementary theory of finite groups. Dokl. Akad. Nauk SSSR 138(4), 771–774 (1961). (in Russian)
4. Ershov, Yu.: Undecidability of the theories of symmetric and simple finite groups. Dokl. Akad. Nauk SSSR 158(4), 777–779 (1964). (in Russian)
5. Dubrov, A., Mkhitaryan, V., Troshin, L.: Multivariate Statistical Methods and Fundamentals of Econometrics. Finance and Statistics, Moscow (2002). (in Russian)