| article html file updated | 7 February 2020 20:09 CET | Update | https://www.mdpi.com/1424-8220/17/1/7 |
| article html file updated | 22 September 2019 14:19 CEST | Update | - |
| article html file updated | 4 May 2019 18:08 CEST | Update | - |
| article html file updated | 8 February 2017 08:35 CET | Update | - |
| article html file updated | 23 December 2016 09:16 CET | Update | - |
| article xml uploaded. | 23 December 2016 09:15 CET | Update | https://www.mdpi.com/1424-8220/17/1/7/xml |
| article xml uploaded. | 23 December 2016 09:15 CET | Update | - |
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| article pdf uploaded. | 23 December 2016 09:15 CET | Updated version of record | https://www.mdpi.com/1424-8220/17/1/7/pdf |
| article html file updated | 22 December 2016 12:24 CET | Original file | - |
| article xml uploaded. | 22 December 2016 12:23 CET | Original file | - |
| article pdf uploaded. | 22 December 2016 12:23 CET | Version of Record | https://www.mdpi.com/1424-8220/17/1/7/pdf-vor |
