Authors
Martin Himmel
himmel@mathematik.uni-mainz.de
Faculty of Mathematics, Computer Science and Econometrics, University of Zielona Góra, Szafrana 4A, 65-516, Zielona Góra, Poland
himmel@mathematik.uni-mainz.de
© 2017 Martin Himmel, published by University of Silesia in Katowice, Institute of Mathematics
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.