@article{10_4064_fm_140_2_137_155,
     author = {C. Ash and J. Knight},
     title = {Relatively recursive expansions},
     journal = {Fundamenta Mathematicae},
     pages = {137--155},
     publisher = {mathdoc},
     volume = {140},
     number = {2},
     year = {1991},
     doi = {10.4064/fm-140-2-137-155},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-140-2-137-155/}
}