@misc{Zieliński_Andrzej_Mobile,
 author={Zieliński, Andrzej and Zieliński, Kazimierz},
 howpublished={online},
 publisher={Instytut Łączności - Państwowy Instytut Badawczy, Warszawa},
 language={ang},
 title={Mobile Telecommunication Systems Changed the Electronic Communications and ICT Market, Journal of Telecommunications and Information Technology, 2013, nr 2},
 type={artykuł},
 keywords={services, market penetration and prospects, GSM cellular network, mobile communication},
}