| article html file updated | 9 February 2020 17:30 CET | Update | https://www.mdpi.com/2079-6439/6/2/31 |
| article html file updated | 3 October 2019 13:38 CEST | Update | - |
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| article pdf uploaded. | 14 May 2018 12:00 CEST | Version of Record | https://www.mdpi.com/2079-6439/6/2/31/pdf |
| article xml uploaded. | 14 May 2018 12:00 CEST | Update | https://www.mdpi.com/2079-6439/6/2/31/xml |
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