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@article{10_4064_fm_99_1_11_13, author = {John Lake}, title = {Undefinable ordinals and the rank hierarchy}, journal = {Fundamenta Mathematicae}, pages = {11--13}, publisher = {mathdoc}, volume = {99}, number = {1}, year = {1978}, doi = {10.4064/fm-99-1-11-13}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-99-1-11-13/} }
John Lake. Undefinable ordinals and the rank hierarchy. Fundamenta Mathematicae, Tome 99 (1978) no. 1, pp. 11-13. doi : 10.4064/fm-99-1-11-13. http://geodesic.mathdoc.fr/articles/10.4064/fm-99-1-11-13/
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