@article{CMUC_1988__29_1_a13,
     author = {Demuth, Osvald},
     title = {Reducibilities of sets based on constructive functions of a real variable},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {143--156},
     publisher = {mathdoc},
     volume = {29},
     number = {1},
     year = {1988},
     mrnumber = {937557},
     zbl = {0646.03038},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1988__29_1_a13/}
}