OA - HD 17/5/17. --
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: 	

    On open access repositories
    Author's pre-prints on pre-print servers
    Creative Commons Attribution License 3.0
    Authors retain copyright
    Publisher's version/PDF may be used
    Published source must be acknowledged. --
Full-text added 24.5.17-MMM