1. G. V. Akhmetzhanova and A. V. Yuryev, Balt. Hum. J 7(3), 334–336 (2018).
2. E. S. Kondyukova, E. G. Shershneva and N. L. Savchenko, Int. Res. J. 10(1), 143–147 (2020).
3. S. V. Novikov, S. P. Kulikov and A. A. Sazonov, Mosc. Ec. J. 12, 771–783 (2019).
4. T. V. Nikulina and E. B. Starichenko, Ped. Ed. in Russ. 8, 107–113 (2018).
5. S. Yu. Odnoralenko, Fin. Mark. and Banks. 1, 27–29 (2021).