@article{MABA_2001_15_1-2_a2,
     author = {Ch. Atakut and N. Ispir},
     title = {The {Order} of {Approximation} by {Certain} {Linear} {Positive} {Operators}},
     journal = {Mathematica balkanica},
     pages = {25},
     publisher = {mathdoc},
     volume = {15},
     number = {1-2},
     year = {2001},
     url = {http://geodesic.mathdoc.fr/item/MABA_2001_15_1-2_a2/}
}