Authors
R. Ameri
Reza AMERI, School of Mathematics, Statistics and Computer Science, College of Sciences, University of Tehran, P.O. Box 14155-6455,, Teheran, Iran
A. Kordi
School of Mathematics, Statistics and Computer Science, College of Sciences, University of Tehran, P.O. Box 14155-6455,, Teheran, Iran
S. Hoskova-Mayerova
Department of Mathematics and Physics, University of Defence, Brno Kounicova 65, 662 10, Brno, Czech Republic