| article html file updated | 9 February 2020 02:39 CET | Update | https://www.mdpi.com/2077-1444/9/1/20 |
| article html file updated | 2 May 2019 03:05 CEST | Update | N/A |
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| article xml uploaded. | 11 January 2018 08:19 CET | Original file | https://www.mdpi.com/2077-1444/9/1/20/xml |
| article pdf uploaded. | 11 January 2018 08:19 CET | Version of Record | https://www.mdpi.com/2077-1444/9/1/20/pdf |
