This article has an erratum: [erratum]

Issue
EPL
Volume 97, Number 4, February 2012
Article Number 48007
Number of page(s) 5
Section Interdisciplinary Physics and Related Areas of Science and Technology
DOI http://dx.doi.org/10.1209/0295-5075/97/48007
Published online 20 February 2012

© EPLA, 2012