@article{CMUC_1988_29_2_a4,
     author = {Demuth, Osvald},
     title = {Remarks on the structure of tt-degrees based on constructive measure theory},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {233--247},
     year = {1988},
     volume = {29},
     number = {2},
     mrnumber = {957390},
     zbl = {0646.03039},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1988_29_2_a4/}
}