| article html file updated | 7 February 2020 21:04 CET | Update | https://www.mdpi.com/2073-4360/9/1/22 |
| article html file updated | 22 September 2019 19:27 CEST | Update | - |
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| article html file updated | 7 February 2017 10:30 CET | Update | - |
| article html file updated | 9 January 2017 11:40 CET | Original file | - |
| article xml uploaded. | 9 January 2017 11:39 CET | Original file | https://www.mdpi.com/2073-4360/9/1/22/xml |
| article pdf uploaded. | 9 January 2017 11:39 CET | Version of Record | https://www.mdpi.com/2073-4360/9/1/22/pdf |
