1. University of Washington Seattle Washington USA
2. Department of Mathematics California State University Northridge California USA
3. Faculty of Mathematics University of Belgrade Belgrade Serbia
4. Department of Mathematical Sciences George Mason University Fairfax Virginia USA
5. Department of Computer Science Technische Universität Braunschweig Braunschweig Germany
6. Division of Mathematics and Computer Science Alfred University Alfred New York USA
7. Department of Mathematics Saint Vincent College Latrobe Pennsylvania USA