| article html file updated | 9 February 2020 01:53 CET | Update | https://www.mdpi.com/2079-4991/8/1/21 |
| article html file updated | 29 September 2019 15:41 CEST | Update | - |
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| article html file updated | 1 February 2018 08:30 CET | Update | - |
| article html file updated | 3 January 2018 14:03 CET | Original file | - |
| article xml uploaded. | 3 January 2018 14:01 CET | Original file | https://www.mdpi.com/2079-4991/8/1/21/xml |
| article pdf uploaded. | 3 January 2018 14:01 CET | Version of Record | https://www.mdpi.com/2079-4991/8/1/21/pdf |
