| article html file updated | 8 February 2020 04:51 CET | Update | https://www.mdpi.com/2226-4787/5/2/24 |
| article html file updated | 24 September 2019 14:45 CEST | Update | N/A |
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| article pdf uploaded. | 2 May 2017 10:25 CEST | Version of Record | https://www.mdpi.com/2226-4787/5/2/24/pdf |
