@article{10_4064_fm_43_2_202_229,
     author = {J. Lipi\'nski},
     title = {Sur les ensembles {f(x)>a}, o\`u f(x) sont des fonctions int\'egrables au sens de {Riemann}},
     journal = {Fundamenta Mathematicae},
     pages = {202--229},
     publisher = {mathdoc},
     volume = {43},
     number = {2},
     year = {1956},
     doi = {10.4064/fm-43-2-202-229},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-43-2-202-229/}
}