- Correspondence to Professor Chris Dibben, University of Edinburgh, Geography Building, Drummond Street, Edinburgh EH8 9XP, UK;
- Received 5 June 2016
- Revised 5 September 2016
- Accepted 8 September 2016
- Published in print 1 March 2017.
- Published online 10 February 2017.
- Published first 10 November 2016.
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