@misc{Allahverdiev_Bilender_P._Singular,
 author={Allahverdiev, Bilender P. and Tuna, Hüseyin},
 howpublished={online},
 publisher={Uniwersytet Marii Curie-Skłodowskiej},
 language={pol},
 language={ang},
 type={artykuł},
 title={Singular linear q - Hamiltonian systems},
 keywords={chemia},
}