@article{AUM_2016_70_2_a6,
     author = {K\k{e}ska, Sergiusz},
     title = {The degree of approximation by {Hausdorff} means of a conjugate {Fourier} series},
     journal = {Annales Universitatis Mariae Curie-Sk{\l}odowska. Mathematica },
     publisher = {mathdoc},
     volume = {70},
     number = {2},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUM_2016_70_2_a6/}
}