@ARTICLE{Szreder_Mariusz_A_2014,
 author={Szreder, Mariusz},
 number={No 3},
 journal={Teka Commission of Motorization and Power Industry in Agriculture},
 howpublished={online},
 year={2014},
 publisher={The Lublin Branch of the Polish Academy of Sciences},
 title={A Study of a Heat Pump Ground Collector},
}