| article html file updated | 9 February 2020 06:17 CET | Update | https://www.mdpi.com/1999-4893/11/2/21 |
| article html file updated | 30 September 2019 17:17 CEST | Update | - |
| article html file updated | 1 May 2019 19:12 CEST | Update | - |
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| article html file updated | 14 March 2018 09:18 CET | Update | - |
| article html file updated | 11 February 2018 09:14 CET | Original file | - |
| article xml uploaded. | 11 February 2018 09:12 CET | Update | https://www.mdpi.com/1999-4893/11/2/21/xml |
| article xml uploaded. | 11 February 2018 09:12 CET | Update | - |
| article xml uploaded. | 11 February 2018 09:12 CET | Original file | - |
| article pdf uploaded. | 11 February 2018 09:12 CET | Version of Record | https://www.mdpi.com/1999-4893/11/2/21/pdf |
