| article html file updated | 9 February 2020 06:42 CET | Update | https://www.mdpi.com/2073-4433/9/2/67 |
| article html file updated | 30 September 2019 19:45 CEST | Update | - |
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| article xml uploaded. | 14 February 2018 16:10 CET | Update | https://www.mdpi.com/2073-4433/9/2/67/xml |
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| article pdf uploaded. | 14 February 2018 16:10 CET | Version of Record | https://www.mdpi.com/2073-4433/9/2/67/pdf |
