Kulczycki, Tadeusz
Kwaśnicki, Mateusz
Siudeja, Bartłomiej
Funding for this research was provided by:
Polish National Science Centre (2012/07/B/ST1/03356)
Institute of Mathematics and Computer Science of Wroclaw University of Technology (Project S30011/I-18)
Institute of Mathematics and Computer Science of Wroclaw University of Technology (Project S30011/I-18)