@article{AUPO_2003_42_1_a10,
     author = {Walczak, Zbigniew},
     title = {Approximation properties of certain linear positive operators in exponential weighted spaces of functions of two variables},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {131--138},
     year = {2003},
     volume = {42},
     number = {1},
     mrnumber = {2056028},
     zbl = {1054.41015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPO_2003_42_1_a10/}
}