This article has an erratum: [erratum]

Issue
EPL
Volume 97, Number 1, February 2012
Article Number 18003
Number of page(s) 6
Section Interdisciplinary Physics and Related Areas of Science and Technology
DOI http://dx.doi.org/10.1209/0295-5075/97/18003
Published online 03 January 2012

© EPLA, 2012