| article html file updated | 9 February 2020 02:56 CET | Update | https://www.mdpi.com/1999-4907/9/1/28 |
| article html file updated | 29 September 2019 21:17 CEST | Update | - |
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| article html file updated | 12 January 2018 18:36 CET | Original file | - |
| article xml uploaded. | 12 January 2018 18:35 CET | Original file | https://www.mdpi.com/1999-4907/9/1/28/xml |
| article pdf uploaded. | 12 January 2018 18:35 CET | Version of Record | https://www.mdpi.com/1999-4907/9/1/28/pdf |
