University of Jyväskylä - Department of Mathematics.

Åbo Akademi University - Mathematics. (Åbo, Finland)

Helsinki University of Technology - Institute of Mathematics.

University of Joensuu - Department of Mathematics.

Tampere University of Technology - Department of Mathematics.

University of Turku - Department of Mathematics.

University of Kuopio - Department of Computer Science and Applied Mathematics.

University of Oulu - Mathematics.

University of Tampere - Department of Mathematics, Statistics and Philosophy.

University of Vaasa - Department of Mathematics and Statistics.

Rolf Nevanlinna Institute - at the University of Helsinki