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