@article{MABA_1992_6_1_a3,
     author = {T. F. Xie and S. P. Zhou},
     title = {A {Problem} on {Approximation} by {Euler} {Means}},
     journal = {Mathematica balkanica},
     pages = {33},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {1992},
     url = {http://geodesic.mathdoc.fr/item/MABA_1992_6_1_a3/}
}