| article html file updated | 7 February 2020 19:41 CET | Update | https://www.mdpi.com/1996-1073/9/12/1059 |
| article html file updated | 22 September 2019 11:57 CEST | Update | - |
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| article html file updated | 28 December 2016 09:05 CET | Update | - |
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| article pdf uploaded. | 15 December 2016 16:03 CET | Version of Record | https://www.mdpi.com/1996-1073/9/12/1059/pdf |
