@article{MAN_1959__138_160704,
     author = {H. ROGERS},
     title = {Computing {Degrees} of {Unsolvability.}},
     journal = {Mathematische Annalen},
     pages = {125--140},
     publisher = {mathdoc},
     volume = {138},
     year = {1959},
     zbl = {0086.01101},
     url = {http://geodesic.mathdoc.fr/item/MAN_1959__138_160704/}
}