@article{10_4064_fm_48_1_85_89,
     author = {G. Lederer},
     title = {A problem on {Baire} classes},
     journal = {Fundamenta Mathematicae},
     pages = {85--89},
     publisher = {mathdoc},
     volume = {48},
     number = {1},
     year = {1959},
     doi = {10.4064/fm-48-1-85-89},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-48-1-85-89/}
}