@misc{_Contemporary,
 howpublished={online},
 publisher={Wydawnictwo Politechniki Śląskiej},
 language={eng},
 title={Contemporary transportation systems : selected theoretical and practical problems : the development of transportation systems},
 type={książka},
 keywords={transport publiczny, transport miejski, systemy transportowe, transport regionalny, transport w krajach Unii Europejskiej},
}