HD 30/10/15. 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. General Conditions: Some individual journals may have policies prohibiting pre-print archiving. On author's personal website or departmental website immediately. On institutional repository or subject-based repository after a 18 months embargo. Publisher's version/PDF cannot be used. Full-text released 12.1.16-MMM