Technische Universität Darmstadt, May 27-June 10, 2001, Darmstadt, Germany.

Universidad de Zaragoza, September 26-October 8, 2005, Zaragoza, Spain.

Technische Universität Darmstadt, April 22-29, 2007, Darmstadt, Germany.

Universidad de Zaragoza, October 21-27, 2007, Zaragoza, Spain. (Here is the poster of my talk delivered on 25.10.2007 in the Seminario Rubio de Francia).

Uniwersytet w Białymstoky, June 5-12, 2011, Białystok, Poland. (Here is the link to the list of talks, including mine, delivered on 8.06.2011 in the Seminarium IM).