@article{10_4064_fm_49_2_171_179,
     author = {J. Shoenfield},
     title = {Undecidable and creative theories},
     journal = {Fundamenta Mathematicae},
     pages = {171--179},
     publisher = {mathdoc},
     volume = {49},
     number = {2},
     year = {1960},
     doi = {10.4064/fm-49-2-171-179},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-49-2-171-179/}
}