| article html file updated | 9 February 2020 04:46 CET | Update | https://www.mdpi.com/2072-666X/9/2/51 |
| article html file updated | 30 September 2019 08:00 CEST | Update | N/A |
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| article xml uploaded. | 29 January 2018 16:36 CET | Update | https://www.mdpi.com/2072-666X/9/2/51/xml |
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| article pdf uploaded. | 29 January 2018 16:36 CET | Version of Record | https://www.mdpi.com/2072-666X/9/2/51/pdf |