Peter Päppinghaus. T und Definierbarkeit von Ordinalzahlen. Arch. Math. Log., 28(2):119-141, 1989. [doi]
@article{Pappinghaus89a, title = {T und Definierbarkeit von Ordinalzahlen}, author = {Peter Päppinghaus}, year = {1989}, doi = {10.1007/BF01633986}, url = {http://dx.doi.org/10.1007/BF01633986}, researchr = {https://researchr.org/publication/Pappinghaus89a}, cites = {0}, citedby = {0}, journal = {Arch. Math. Log.}, volume = {28}, number = {2}, pages = {119-141}, }