| article html file updated | 7 February 2020 22:07 CET | Update | https://www.mdpi.com/2073-4425/8/2/47 |
| article html file updated | 12 September 2019 07:42 CEST | Update | - |
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| article html file updated | 2 March 2017 10:45 CET | Update | - |
| article html file updated | 23 February 2017 10:24 CET | Original file | - |
| article xml uploaded. | 23 February 2017 10:23 CET | Original file | https://www.mdpi.com/2073-4425/8/2/47/xml |
| article pdf uploaded. | 24 January 2017 09:55 CET | Version of Record | https://www.mdpi.com/2073-4425/8/2/47/pdf |
