| article html file updated | 5 February 2020 09:11 CET | Update | https://www.mdpi.com/1420-3049/11/9/720 |
| article html file updated | 9 May 2019 17:48 CEST | Update | - |
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| article html file updated | 24 July 2017 05:30 CEST | Original file | - |
| article xml uploaded. | 24 July 2017 05:29 CEST | Update | https://www.mdpi.com/1420-3049/11/9/720/xml |
