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
Creative Commons Attribution License 3.0   Authors retain copyright    Publisher's version/PDF may be used
From journal page: This journal provides immediate open access to its content on the principle that making research freely available to the public supports a greater global exchange of knowledge.   ----  MA 6/4/18