| article html file updated | 7 February 2020 09:26 CET | Update | https://www.mdpi.com/1996-1944/9/6/425 |
| article html file updated | 5 May 2019 14:22 CEST | Update | - |
| article html file updated | 27 March 2019 06:02 CET | Update | - |
| article html file updated | 28 June 2016 12:10 CEST | Update | - |
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| article html file updated | 28 May 2016 10:05 CEST | Original file | - |
| article xml uploaded. | 28 May 2016 10:04 CEST | Original file | https://www.mdpi.com/1996-1944/9/6/425/xml |
| article pdf uploaded. | 28 May 2016 10:04 CEST | Version of Record | https://www.mdpi.com/1996-1944/9/6/425/pdf |
