| article html file updated | 8 February 2020 06:45 CET | Update | https://www.mdpi.com/2072-6643/9/6/542 |
| article html file updated | 25 September 2019 00:38 CEST | Update | - |
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| article html file updated | 29 June 2017 11:41 CEST | Update | - |
| article html file updated | 26 May 2017 07:45 CEST | Original file | - |
| article xml uploaded. | 26 May 2017 07:43 CEST | Original file | https://www.mdpi.com/2072-6643/9/6/542/xml |
| article pdf uploaded. | 26 May 2017 07:43 CEST | Version of Record | https://www.mdpi.com/2072-6643/9/6/542/pdf |
