| article html file updated | 9 February 2020 03:13 CET | Update | https://www.mdpi.com/2308-3425/5/1/2 |
| article html file updated | 29 September 2019 22:57 CEST | Update | N/A |
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| article xml uploaded. | 16 January 2018 09:26 CET | Update | https://www.mdpi.com/2308-3425/5/1/2/xml |
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| article pdf uploaded. | 16 January 2018 09:26 CET | Version of Record | https://www.mdpi.com/2308-3425/5/1/2/pdf |