@article{PMF_1923-1924_33_1_a9,
     author = {Zygmund, Antoni},
     title = {O module ci\k{a}g{\l}o\'sci szeregu sprz\k{e}\.zonego z szeregiem {Fouriera}},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {125--132},
     publisher = {mathdoc},
     volume = {33},
     number = {1},
     year = {1923-1924},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/PMF_1923-1924_33_1_a9/}
}