OA - HD 7/2/17. - Green in Sherpa: Author's Pre-print: green tick author can archive pre-print (ie pre-refereeing) Author's Post-print: green tick author can archive post-print (ie final draft post-refereeing) Publisher's Version/PDF: grey tick subject to Restrictions below, author can archive publisher's version/PDF General Conditions: Authors retain copyright Publisher's version/PDF may be used on request. - File added, 15.2.17-MMM