@article{10_4064_sm156_2_4,
     author = {Chang-Pao Chen and Ming-Chuan Chen},
     title = {Weighted integrability of double cosine series
  with nonnegative coefficients},
     journal = {Studia Mathematica},
     pages = {133--141},
     publisher = {mathdoc},
     volume = {156},
     number = {2},
     year = {2003},
     doi = {10.4064/sm156-2-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm156-2-4/}
}