@article{AL_1972_11_3_a4,
     author = {A. H. Lachlan},
     title = {Recursively enumerable many-one degrees},
     journal = {Algebra i logika},
     pages = {326--358},
     publisher = {mathdoc},
     volume = {11},
     number = {3},
     year = {1972},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AL_1972_11_3_a4/}
}