HD 5/11/18 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: green tick author can archive publisher's version/PDF General Conditions: Pre-print must be removed and replaced with a link to the published version Published source must be acknowledged On author's personal website or institutional website Publisher's version/PDF may be used, but no permissions found, LL 7/11/18