| article html file updated | 9 February 2020 05:59 CET | Update | https://www.mdpi.com/2077-1444/9/2/51 |
| article html file updated | 1 May 2019 19:55 CEST | Update | - |
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| article html file updated | 28 March 2019 21:56 CET | Update | - |
| article html file updated | 14 March 2018 15:13 CET | Update | - |
| article html file updated | 8 February 2018 17:10 CET | Original file | - |
| article xml uploaded. | 8 February 2018 17:09 CET | Original file | https://www.mdpi.com/2077-1444/9/2/51/xml |
| article pdf uploaded. | 8 February 2018 17:09 CET | Version of Record | https://www.mdpi.com/2077-1444/9/2/51/pdf |
