| article html file updated | 9 February 2020 04:12 CET | Update | https://www.mdpi.com/2410-3888/3/1/7 |
| article html file updated | 1 May 2019 23:51 CEST | Update | - |
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| article html file updated | 28 March 2019 18:03 CET | Update | - |
| article html file updated | 25 January 2018 16:19 CET | Original file | - |
| article xml uploaded. | 25 January 2018 16:18 CET | Original file | https://www.mdpi.com/2410-3888/3/1/7/xml |
| article pdf uploaded. | 25 January 2018 16:14 CET | Version of Record | https://www.mdpi.com/2410-3888/3/1/7/pdf |
