@article{10_4064_fm_114_1_85_90,
     author = {Denis Higgs},
     title = {Characteristic functions freely generate measurable functions},
     journal = {Fundamenta Mathematicae},
     pages = {85--90},
     publisher = {mathdoc},
     volume = {114},
     number = {1},
     year = {1981},
     doi = {10.4064/fm-114-1-85-90},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-114-1-85-90/}
}