@article{10_4064_fm_157_1_15_32,
     author = {Tam\'as Keleti},
     title = {Difference functions of periodic measurable functions},
     journal = {Fundamenta Mathematicae},
     pages = {15--32},
     publisher = {mathdoc},
     volume = {157},
     number = {1},
     year = {1998},
     doi = {10.4064/fm-157-1-15-32},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-157-1-15-32/}
}