@article{10_14708_cm_v19i1_5843,
     author = {H. Musielak},
     title = {Fractional partial derivatives and approximation of functions of two real variables},
     journal = {Commentationes Mathematicae},
     pages = { 97--110},
     publisher = {mathdoc},
     volume = {19},
     number = {1},
     year = {1976},
     doi = {10.14708/cm.v19i1.5843},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v19i1.5843/}
}