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@article{AMLG_1977__18_137924, author = {Yuri Gurevich}, title = {Semi-conservative recduction.}, journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung}, pages = {23--26}, publisher = {mathdoc}, volume = {18}, year = {1977}, url = {http://geodesic.mathdoc.fr/item/AMLG_1977__18_137924/} }
Yuri Gurevich. Semi-conservative recduction.. Archiv für mathematische Logik und Grundlagenforschung, Tome 18 (1977), pp. 23-26. http://geodesic.mathdoc.fr/item/AMLG_1977__18_137924/