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: 	

    Publisher's version/PDF may be used
    Published source must be acknowledged
    Creative Commons Attribution License
    Authors are encouraged to submit their published articles to institutional repositories, 23.9.136--MMM