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.

New Technologies Publishing House.

Routledge.

Yerevan State Medical University.