@article{Michurina2021extracurricular, author={Michurina, E.S. and Kozhevnikova, E.E. and Tuzhilkin, S.A.}, title={Extracurricular Activities as a Condition for the Intellectual Development of Young Teenagers}, journal={Bulletin of Kemerovo State University. Series: Humanities and Social Sciences}, publisher={Kemerovo State University}, year={2021}, pages={21-31}, volume={2021}, issue={1}, }