@misc{Polski_Rejestr_Statków_Requirements,
 author={Polski Rejestr Statków},
 howpublished={online},
 publisher={Polski Rejestr Statków},
 language={eng},
 type={e-książka},
 title={Requirements for vessels and units with dynamic positioning (DP) systems, 2019 July},
 keywords={statki, nawigacja},
}