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@article{AMLG_1982__22_137994, author = {E.G.K. L\'opez-Escobar}, title = {Further applications of ultra-conservative ...-rules.}, journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung}, pages = {89--102}, publisher = {mathdoc}, volume = {22}, year = {1982}, zbl = {0535.03030}, url = {http://geodesic.mathdoc.fr/item/AMLG_1982__22_137994/} }
E.G.K. López-Escobar. Further applications of ultra-conservative ...-rules.. Archiv für mathematische Logik und Grundlagenforschung, Tome 22 (1982), pp. 89-102. http://geodesic.mathdoc.fr/item/AMLG_1982__22_137994/