@misc{Hałas_Stanisław_(1945-2017)._Ion,
 author={Hałas, Stanisław (1945-2017). and Sikora, Jarosław.},
 howpublished={online},
 publisher={UMCS},
 language={eng},
 type={artykuł},
 title={Ion focusing in cycloidal mass spectrometers},
 keywords={fizyka},
}