@article{10_21136_MB_2014_143637,
     author = {Krasniqi, Xhevat Z. and K\'orus, P\'eter and M\'oricz, Ferenc},
     title = {Necessary conditions for the $L^{p}$-convergence $(0<p<1)$ of single and double trigonometric series},
     journal = {Mathematica Bohemica},
     pages = {75--88},
     publisher = {mathdoc},
     volume = {139},
     number = {1},
     year = {2014},
     doi = {10.21136/MB.2014.143637},
     mrnumber = {3231430},
     zbl = {06362243},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.2014.143637/}
}