Imran Alsous, Jasmin
Villoutreix, Paul
Stoop, Norbert
Shvartsman, Stanislav Y.
Dunkel, Jörn http://orcid.org/0000-0001-8865-2369
Article History
Received: 6 September 2017
Accepted: 8 June 2018
First Online: 16 July 2018
Change Date: 8 August 2018
Change Type: Correction
Change Details: In the version of this Letter originally published, the citations to equation (1) in Fig. 3 caption and the main text were incorrect; they should have been to equation (2). This has now been corrected.
Competing interests
: The authors declare no competing interests.