category c1 Refereed Journal Article pt.12/12/11, VU author signed VUIR pt.12/12/11. 16/7/12 HD. Blue in Sherpa: Author's Pre-print: archiving status unclear, Author's Post-print:   author can archive post-print ie final draft post-refereeing), Publisher's Version/PDF:   archiving status unknown, Requested Post-Print, (Grace has signed VUIR) 19.11.13-MMM. Post-print received, 24.12.13-MMM