| article html file updated | 7 February 2020 12:14 CET | Update | https://new.mdpi.com/1996-1073/9/8/576 |
| article html file updated | 5 May 2019 09:11 CEST | Update | - |
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| article pdf uploaded. | 25 July 2016 08:43 CEST | Version of Record | https://new.mdpi.com/1996-1073/9/8/576/pdf |
