@misc{Gil'_Michael_Resolvent,
 author={Gil', Michael},
 howpublished={online},
 publisher={Uniwersytet Marii Curie-Skłodowskiej},
 language={eng},
 type={artykuł},
 title={Resolvent and spectrum of a nonselfad joint differential operator in a Hilbert space},
 keywords={matematyka},
}