@misc{Kobus_Ryszard_Evolution,
 author={Kobus, Ryszard and Raudszus, Frank},
 howpublished={online},
 publisher={National Institute of Telecommunications},
 language={ang},
 title={Evolution of Measurement of the Single Piece Mail Transit Time, Journal of Telecommunications and Information Technology, 2017, nr 4},
 type={artykuł},
 keywords={postal services, measurements of transit time, European standards},
}