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    Δ11‐Good Inductive Definitions Over The Continuum.Jacques Grassin - 1981 - Mathematical Logic Quarterly 27 (1):11-16.
  2.  31
    Δ11-Good Inductive Definitions Over The Continuum.Jacques Grassin - 1981 - Zeitschrift fur mathematische Logik und Grundlagen der Mathematik 27 (1):11-16.
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    Index sets in Ershov's hierarchy.Jacques Grassin - 1974 - Journal of Symbolic Logic 39 (1):97-104.