SAGE Publications Ltd.

Inderscience Publishers.

John Wiley and Sons Inc.

Routledge.

Cambridge University Press.

Trans Tech Publications Ltd.

Springer Nature. 2021.

Editura Academiei Romane.

Krause und Pachernegg GmbH.

CEUR-WS.

Element D.O.O..

Springer Science and Business Media Deutschland GmbH.

University of Kragujevac, Faculty of Science.

Pensoft Publishers.

Springer Science and Business Media Deutschland GmbH.