Abstract
We show that if
Information
Published: 1 January 2013
First available in Project Euclid: 13 July 2015
zbMATH: 1382.58013
MathSciNet: MR3183931
Digital Object Identifier: 10.7546/giq-14-2013-74-86
Rights: Copyright © 2013 Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences