@article{10_4064_fm_119_1_49_62,
     author = {Henk Barendregt and Giuseppe Longo},
     title = {Recursion theoretic operators and morphisms on numbered sets},
     journal = {Fundamenta Mathematicae},
     pages = {49--62},
     publisher = {mathdoc},
     volume = {119},
     number = {1},
     year = {1983},
     doi = {10.4064/fm-119-1-49-62},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-119-1-49-62/}
}