| article html file updated | 7 February 2020 10:30 CET | Update | https://www.mdpi.com/1424-8220/16/6/923 |
| article html file updated | 5 May 2019 12:18 CEST | Update | - |
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| article pdf uploaded. | 21 June 2016 15:05 CEST | Version of Record | https://www.mdpi.com/1424-8220/16/6/923/pdf |
