@article{10_14708_cm_v16i1_5729,
     author = {R. Taberski},
     title = {Approximation of real functions by the double trigonometric polynomials},
     journal = {Commentationes Mathematicae},
     pages = { 113--123},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {1972},
     doi = {10.14708/cm.v16i1.5729},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v16i1.5729/}
}