| article html file updated | 6 February 2020 05:32 CET | Update | https://www.mdpi.com/2075-471X/2/4/440 |
| article html file updated | 7 May 2019 22:10 CEST | Update | - |
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| article html file updated | 16 March 2017 02:55 CET | Original file | - |
| article pdf uploaded. | 13 November 2013 16:12 CET | Version of Record | https://www.mdpi.com/2075-471X/2/4/440/pdf |
