@misc{Renelt_Heinrich_Smooth,
 author={Renelt, Heinrich},
 howpublished={online},
 publisher={Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej},
 language={eng},
 type={artykuł},
 title={Smooth Approximation of Solutions of Cauchy-Riemann Systems},
 keywords={Cauchy-Riemann systems, smooth approximation},
}