@article{10_4064_fm_90_1_45_52,
     author = {Michael Morley and Robert Soare},
     title = {Boolean algebras, splitting theorems, and $\ensuremath{\Delta}^0_2$ sets},
     journal = {Fundamenta Mathematicae},
     pages = {45--52},
     publisher = {mathdoc},
     volume = {90},
     number = {1},
     year = {1975},
     doi = {10.4064/fm-90-1-45-52},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-90-1-45-52/}
}