@article{10_4064_cm_1_4_297_304,
     author = {Stanis{\l}aw Hartman and Hugo Steinhaus and H. Fast},
     title = {Sur les presque-p\'eriodes des fonctions p\'eriodiques},
     journal = {Colloquium Mathematicum},
     pages = {297--304},
     publisher = {mathdoc},
     volume = {1},
     number = {4},
     year = {1947},
     doi = {10.4064/cm-1-4-297-304},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-1-4-297-304/}
}