@article{NSJOM_1992_22_2a_6,
     author = {Razi 

 Quasim and Umar Sarfaraz},
     title = {Degree 

 of {L1} approximation to integrable functions by integrated 

 {Meyer-K\"onig} and {Zeller} operators},
     journal = {Novi Sad Journal of Mathematics},
     pages = {71-80},
     publisher = {mathdoc},
     volume = {22},
     number = {2},
     year = {1992},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1992_22_2a_6/}
}