| article html file updated | 7 February 2020 20:54 CET | Update | https://www.mdpi.com/2073-4360/9/1/18 |
| article html file updated | 22 September 2019 18:31 CEST | Update | - |
| article html file updated | 4 May 2019 16:32 CEST | Update | - |
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| article html file updated | 7 February 2017 10:29 CET | Update | - |
| article html file updated | 6 January 2017 08:57 CET | Original file | - |
| article xml uploaded. | 6 January 2017 08:55 CET | Original file | https://www.mdpi.com/2073-4360/9/1/18/xml |
| article pdf uploaded. | 6 January 2017 08:55 CET | Version of Record | https://www.mdpi.com/2073-4360/9/1/18/pdf |
