Springer.

Московский государственный университет им. М.В. Ломоносова.

LLC V EM PUBLISHING HOUSE.

Oxford University Press.

Emerald Group Publishing Ltd..

Oxford University Press.

PROF SCI PUBL.

Nature Publishing Group.

Blackwell Publishing Ltd.

Routledge.

BMJ Publishing Group.

MDPI Multidisciplinary Digital Publishing Institute.

Institute of Astronomy and Rozhen NAO.

Bulgarian Academy of Sciences.