LL 15/2/17. --
Yellow in Sherpa: Author's Pre-print: author can archive pre-print (ie pre-refereeing)
Author's Post-print: 	author cannot archive post-print (ie final draft post-refereeing)
Publisher's Version/PDF: author cannot archive publisher's version/PDF
General Conditions: On any website
    Publisher's version/PDF cannot be used
    Publisher copyright and source must be acknowledged with citation. -- not requested, 16.2.17-MMM