@misc{Lewandowski_Zdzisław_(1929-2011)_On,
 author={Lewandowski, Zdzisław (1929-2011) and Stankiewicz, Jan},
 howpublished={online},
 publisher={nakł. UMCS},
 language={eng},
 title={On Mutually Adjoint Close — to — Convex Functions},
 type={artykuł},
 keywords={matematyka},
}