This article has an erratum: [erratum]

Issue
EPL
Volume 98, Number 6, June 2012
Article Number 68005
Number of page(s) 6
Section Interdisciplinary Physics and Related Areas of Science and Technology
DOI http://dx.doi.org/10.1209/0295-5075/98/68005
Published online 10 July 2012

© EPLA, 2012