MDPI AG.

Juliusz Schauder Center for Nonlinear Analysis.

American Mathematical Society.

9th International Conference on Industrial Technology and Management, ICITM 2020. Institute of Electrical and Electronics Engineers Inc..

International Journal of Scientific and Technology Research.

Springer.

Wiley-VCH Verlag.

E. Schweizerbart'sche Verlagsbuchhandlung.

Springer.

Brill Nijhoff.

Mathematical Society of Japan.

Springer Science and Business Media B.V..

Birkhauser.

SPER Publications.

Полоцкий государственный университет имени Евфросинии Полоцкой.