@misc{Polski_Rejestr_Statków_Guidelines,
 author={Polski Rejestr Statków},
 howpublished={online},
 publisher={Polski Rejestr Statków},
 language={eng},
 type={e-książka},
 title={Guidelines regarding the requirements for marine diesel engines fitted with NOx selective catalytic reduction (SCR) systems : 2019 January},
 keywords={emisja gazów i pyłów, silniki okrętowe},
}