Blue in Sherpa: Author's Pre-print: archiving status unclear 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: •On author's personal website or organisations website, •Publisher copyright and source must be acknowledged •Statement that readers must ask permission to reproduce •Authors retain copyright •Publisher's version/PDF cannot be used, 10.6.15--MMM