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 can archive publisher's version/PDF
General Conditions: On open access repositories
    Creative Commons Attribution License 4.0
    Published source must be acknowledged
    Publisher's version/PDF may be used, 23.8.16--MMM