Muraviev, A. V.
Smolski, V. O.
Loparo, Z. E.
Vodopyanov, K. L.
Article History
Received: 2 October 2017
Accepted: 20 February 2018
First Online: 26 March 2018
Change Date: 1 June 2018
Change Type: Correction
Change Details: In the version of this Article originally published, in equation (9), the ‘Δ’ in the first ‘Δfrep’ shouldn’t have been included and, in equation (10), within the brackets, frep and f were the wrong way round. These equations have now been corrected in the online versions.
Competing interests
: The authors declare no competing interests.