Vaquero-Sedas, MarĂa I.
Vega-Palas, Miguel A.
Article History
Received: 2 December 2013
Accepted: 16 June 2014
First Online: 2 July 2014
Change Date: 22 November 2016
Change Type: Update
Change Details: A correction has been published and is appended to both the HTML and PDF versions of this paper. The error has not been fixed in the paper.
Competing interests
: The authors declare no competing financial interests.