| article html file updated | 9 February 2020 05:27 CET | Update | https://www.mdpi.com/2077-1444/9/2/47 |
| article html file updated | 1 May 2019 21:07 CEST | Update | - |
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| article html file updated | 14 March 2018 15:13 CET | Update | - |
| article html file updated | 3 February 2018 13:12 CET | Original file | - |
| article xml uploaded. | 3 February 2018 13:11 CET | Original file | https://www.mdpi.com/2077-1444/9/2/47/xml |
| article pdf uploaded. | 3 February 2018 13:11 CET | Version of Record | https://www.mdpi.com/2077-1444/9/2/47/pdf |
