Contacts

Direct contacts with the Editors-in-Chief:

• Sava Grozdev, Professor, DSc, Academician of Bulgarian Academy of Sciences and Arts

e-mail: sava.grozdev@gmail.com

• Hiroshi Okumura, Professor, Ph.D. Maebashi Gunma, Japan

e-mail: hokmr@yandex.com

• Veselin Nenkov, Professor, PhD “Nikola Vaptsarov” Naval Academy – Varna, Bulgaria

e-mail: vnenkov@mail.bg