| article html file updated | 9 February 2020 02:41 CET | Update | https://www.mdpi.com/2073-4344/8/1/20 |
| article html file updated | 29 September 2019 19:57 CEST | Update | - |
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| article html file updated | 1 February 2018 10:09 CET | Update | - |
| article html file updated | 11 January 2018 15:49 CET | Original file | - |
| article xml uploaded. | 11 January 2018 15:48 CET | Update | https://www.mdpi.com/2073-4344/8/1/20/xml |
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| article pdf uploaded. | 11 January 2018 15:48 CET | Version of Record | https://www.mdpi.com/2073-4344/8/1/20/pdf |
