c1 Refereed Journal Article. Yellow in Sherpa; Author's Pre-print: author can archive pre-print (ie pre-refereeing)
Author's Post-print: subject to Restrictions below, author can archive post-print (ie final draft post-refereeing)  Restrictions:    12 months embargo  Publisher's Version/PDF: author cannot archive publisher's version/PDF --MA 28/2/14 & 18.9.14-MMM, Requested (Graham) Accepted v & Permission 18.9.14-MMM