| article html file updated | 9 February 2020 03:50 CET | Update | https://www.mdpi.com/2075-4701/8/1/80 |
| article html file updated | 30 September 2019 02:37 CEST | Update | N/A |
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| article xml uploaded. | 21 January 2018 10:51 CET | Update | https://www.mdpi.com/2075-4701/8/1/80/xml |
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| article pdf uploaded. | 21 January 2018 10:50 CET | Version of Record | https://www.mdpi.com/2075-4701/8/1/80/pdf |