Zur Einbettungsbedingung im Zusammenhang mit einer Programmiersprache von Engeler.
Various remarks on quasi-universal model classes.
Quasi-axiomatic classes.
On relational selections for complete theories.
Diagonal-like embeddings
On generalized projective classes
On reductive and projective classes
Some Remarks on Projective Model Classes and the Interpolation Theorem.
Remarks on Model Classes Acting on One Another.
On some properties a projective model class passes on to the generated axiomatic class.
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