Springer.

John Wiley and Sons Ltd.

Elsevier B.V..

John Wiley and Sons Inc.

International Institute for General Systems Studies.

Elsevier B.V..

Bionika Media Ltd..

Springer Science and Business Media Deutschland GmbH.

American Institute of Mathematical Sciences.

Springer Science and Business Media Deutschland GmbH.

Higher Education Press Limited Company.

Walter de Gruyter GmbH.

Elsevier B.V..

World Scientific.

Institute of Physics.