@misc{Kempa_Wojciech_M._On,
 author={Kempa, Wojciech M.},
 howpublished={online},
 publisher={Wydaw. Uniwersytetu Marii Curie-Skłodowskiej},
 language={eng},
 type={czasopismo},
 title={On departure process in the batch arrival queue with single vacation and setup time},
}