| article html file updated | 9 February 2020 04:45 CET | Update | https://www.mdpi.com/2075-163X/8/2/45 |
| article html file updated | 1 May 2019 22:43 CEST | Update | - |
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| article xml uploaded. | 29 January 2018 16:05 CET | Update | https://www.mdpi.com/2075-163X/8/2/45/xml |
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| article pdf uploaded. | 29 January 2018 16:05 CET | Version of Record | https://www.mdpi.com/2075-163X/8/2/45/pdf |