NLM (Medline).

Editura Academiei Romane/Publishing House of the Romanian Academy.

John Wiley and Sons Inc.

Elsevier GmbH.

International Society for Horticultural Science.

Universidad de Concepcion.

Springer Verlag.

Springer Netherlands.

Springer Verlag.

Springer-Verlag Wien.

Чувашский государственный университет им. И.Н. Ульянова.

School of Medicine, Tehran University of Medical Sciences.

Rīgas Stradiņa universitāte.