Authors
Zbigniew Matuszak
AM Maritime University of Szczecin, Faculty of Marine Engineering Wały Chrobrego 1-2 Street, 70-500, Szczecin, Poland
Michał Bartosz
Maritime University of Szczecin, Faculty of Economics and Transport Engineering Henryka Pobożnego 11 Street, 70-507, Szczecin, Poland
Dalibor Barta
PhD University of Zilina, Univerzitná 8215/1,, Žilina, Slovakia