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    • Los retículos de las clases de Schunck normales y de las clases derivadas 

      Lafuente López, Julio Upna (Real Sociedad Matemática EspañolaCSIC, 1979)   Artículo / Artikulua  OpenAccess
      All groups to be considered are finite. The main result of this paper is the following: the normal Schunck classes compose a complete and distributive lattice antiisomorphic to the lattice composed by the derived classes. ...