c1 Refereed Journal Article, green in Sherpa: Author's Pre-print:   author can archive pre-print (ie pre-refereeing) 
Author's Post-print:   author can archive post-print (ie final draft post-refereeing) Publisher's Version/PDF:   author cannot archive publisher's version/PDF LL 23.4.14 & 19.8.14-MMM. Requesetd (Peng) Accepted v. & Permission, Aug 2014-MMM