Authors
G. Strautmanis
Latvian Maritime Academy, Riga, Latvia
I. Schukin
Riga Technical University, Riga, Latvia
G. Filimonikhin
Central Ukrainian National Technical University, Kropyvnytskyi, Ukraine
M. Mezitis
Transport Academy, Riga, Latvia
I. Kurjanovics
Latvian Maritime Academy, Riga, Latvia