LL 26/6/17. -- Blue in Sherpa: Author's Pre-print: question mark archiving status unclear Author's Post-print: green tick author can archive post-print (ie final draft post-refereeing) Publisher's Version/PDF: green tick author can archive publisher's version/PDF General Conditions: On open access repositories Publisher's version/PDF may be used. -- Full-text added 30.6.17-MMM