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*K-theory for the C*-algebras of the classical Lamploghter groups.*University of French-Compte, Besancon, France, 2015*A recent result on C*-simplicity and the unique trace property.*University of Neuchatel, Switzerland, 2014*A simple approach to the simplicity of some L*Saarland University, Saarbrucken, Germany. 2014^{p}–operator algebras.*Simplicity of some L*Lund University, Sweden, 2013^{p}-operator crossed products.

*Commutators in operator algebras.*Ferdowsi University of Mashhad, Iran, 2011