@article{10_4064_sm_24_3_305_310,
     author = {Z. Ziele\'zny},
     title = {On formal trigonometrical series},
     journal = {Studia Mathematica},
     pages = {305--310},
     year = {1964},
     volume = {24},
     number = {3},
     doi = {10.4064/sm-24-3-305-310},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-24-3-305-310/}
}