@article{10_4064_fm_58_2_113_141,
     author = {A. Nerode},
     title = {Combinatorial series and recursive equivalence types},
     journal = {Fundamenta Mathematicae},
     pages = {113--141},
     publisher = {mathdoc},
     volume = {58},
     number = {2},
     year = {1966},
     doi = {10.4064/fm-58-2-113-141},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-58-2-113-141/}
}