@misc{Kalenik_Marek_Model,
 author={Kalenik, Marek and Chalecki, Marek},
 address={Koszalin},
 howpublished={online},
 publisher={Politechnika Koszalińska},
 language={eng},
 type={artykuł w czasopiśmie},
 title={Model investigations of flow rate and efficiency of air lift pump with PM 50 mixer and circumferential mixer},
 keywords={air lift pump, perforated rubber membrane mixer, circumferential mixer, two-phase flow},
}