@article{10_4064_fm_85_2_177_183,
     author = {Roy Davies},
     title = {Representation of functions of two variables as sums of rectangular functions, {I}},
     journal = {Fundamenta Mathematicae},
     pages = {177--183},
     publisher = {mathdoc},
     volume = {85},
     number = {2},
     year = {1974},
     doi = {10.4064/fm-85-2-177-183},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-85-2-177-183/}
}