@article{PIM_1990_N_S_48_62_a9,
     author = {Dimitros G. Natsis and \v{C}aslav V. Stanojevi\'c},
     title = {L1-Convergence {Of} {Fourier} {Series} {With} {Coefficients} {Monotonic} {With} {Respect} {To} {Regularly} {Varying} {Sequences}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {83 },
     publisher = {mathdoc},
     volume = {_N_S_48},
     number = {62},
     year = {1990},
     url = {http://geodesic.mathdoc.fr/item/PIM_1990_N_S_48_62_a9/}
}