| article html file updated | 9 February 2020 09:45 CET | Update | https://www.mdpi.com/1999-4907/9/3/137 |
| article html file updated | 1 October 2019 14:32 CEST | Update | - |
| article html file updated | 1 May 2019 11:57 CEST | Update | - |
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| article html file updated | 26 March 2018 13:38 CEST | Update | - |
| article html file updated | 14 March 2018 04:39 CET | Original file | - |
| article xml uploaded. | 14 March 2018 04:38 CET | Original file | https://www.mdpi.com/1999-4907/9/3/137/xml |
| article pdf uploaded. | 14 March 2018 04:38 CET | Version of Record | https://www.mdpi.com/1999-4907/9/3/137/pdf |
