@article{10_4064_sm_41_2_131_135,
     author = {C. Neugebauer},
     title = {Differentiation of trigonometric series},
     journal = {Studia Mathematica},
     pages = {131--135},
     publisher = {mathdoc},
     volume = {41},
     number = {2},
     year = {1972},
     doi = {10.4064/sm-41-2-131-135},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-41-2-131-135/}
}