@article{EMJ_2012_3_1_a4,
     author = {A. \.Izgi},
     title = {Approximation by composition of {Sz\"asz-Mirakyan} and {Durrmeyer-Chlodowsky} operators},
     journal = {Eurasian mathematical journal},
     pages = {63--71},
     publisher = {mathdoc},
     volume = {3},
     number = {1},
     year = {2012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EMJ_2012_3_1_a4/}
}