c1 Refereed Journal Article. MA 26/2/14. 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 cannot archive publisher's version/PDF,
Requesed (Remco) accepted v. & Permission, 1.5.14-MMM.  Author does not have file of accepted version, 14.5.14-MMM