1. The class of 2-dimensional neat reducts of polyadic algebras is not elementary;Sayed Ahmed;Fundementa Mathematicea,2002
2. A model-theoretic solution to a problem of Tarski;Sayed Ahmed;Mathematical Logic Quarterly,2002
3. Martin’s axiom, omitting types and complete representations in algebraic logic;Sayed Ahmed;Studia Logica,2002
4. Neat embeddings, interpolation, and omitting types, an overview;Sayed Ahmed;Notre Dame Journal of Formal Logic,2003
5. On amalgamation of reducts of polyadic algebras;Sayed Ahmed;Algebra Universalis,2004