| article html file updated | 9 February 2020 02:05 CET | Update | https://www.mdpi.com/2077-1444/9/1/13 |
| article html file updated | 29 September 2019 16:45 CEST | Update | - |
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| article html file updated | 1 February 2018 07:46 CET | Update | - |
| article html file updated | 5 January 2018 10:07 CET | Original file | - |
| article xml uploaded. | 5 January 2018 10:06 CET | Original file | https://www.mdpi.com/2077-1444/9/1/13/xml |
| article pdf uploaded. | 5 January 2018 10:06 CET | Version of Record | https://www.mdpi.com/2077-1444/9/1/13/pdf |
