Elsevier B.V..

American Institute of Mathematical Sciences.

Elsevier B.V..

Academic Press.

Elsevier B.V..

American Chemical Society.

Taylor and Francis Inc..

Taylor and Francis Ltd.

Geographical Institute "Jovan Cviji" of the Serbian Academy of Sciences and Arts.

ALMA MATER Publishing House – "VASILE ALECSANDRI" UNIVERSITY OF BACAU.

University of Alicante.

Economic Laboratory for Transition Research.

Institution of Russian Academy of Sciences.

Birkhauser.

Universitatea din Craiova.