@misc{Szelachowska_Małgorzata_GDQM-PL13_2014,
 author={Szelachowska, Małgorzata and Kryński, Jan},
 copyright={Instytut Geodezji i Kartografii},
 address={Warszawa},
 howpublished={online},
 year={2014},
 publisher={Instytut Geodezji i Kartografii},
 language={pol},
 language={eng},
 title={GDQM-PL13 – the new gravimetric quasigeoid model for Poland},
 type={artykuł},
 keywords={gravimetric quasigeoid model, least squares collocation, GNSS/levelling data, global geopotential model},
}