@misc{Antohe_Ştefan_The,
 author={Antohe, Ştefan and Chiţu, Cătălin},
 howpublished={online},
 publisher={Pedagogical University of Kraków},
 language={eng},
 type={referat},
 type={artykuł z pracy zbiorowej},
 title={The study of the linear elastic oscillator},
 keywords={energy, oscillations, modern methods},
}