@article{10_14708_cm_v49i1_5277,
     author = {Paul Leo Butzer and Harun Karsli},
     title = {Voronovskaya-Type {Theorems} for {Derivatives} of the {Bernstein-Chlodovsky} {Polynomials} and the {Sz\'asz-Mirakyan} {Operator}},
     journal = {Commentationes Mathematicae},
     pages = { 33--58},
     year = {2009},
     volume = {49},
     number = {1},
     doi = {10.14708/cm.v49i1.5277},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v49i1.5277/}
}