@misc{Matysko_Robert_Ground,
 author={Matysko, Robert},
 address={Koszalin},
 howpublished={online},
 publisher={Publishing House of the Koszalin University of Technology},
 language={eng},
 type={artykuł w czasopiśmie},
 title={Ground as a source of heat for heat pumps},
 keywords={heat pump, ground heat exchanger, transient behaviour, ground regeneration},
}