| article html file updated | 8 February 2020 02:57 CET | Update | https://www.mdpi.com/1424-8220/17/4/771 |
| article html file updated | 24 September 2019 04:18 CEST | Update | - |
| article html file updated | 4 May 2019 03:28 CEST | Update | - |
| article html file updated | 29 April 2017 13:52 CEST | Update | - |
| article html file updated | 6 April 2017 06:09 CEST | Original file | - |
| article xml uploaded. | 6 April 2017 06:08 CEST | Original file | https://www.mdpi.com/1424-8220/17/4/771/xml |
| article pdf uploaded. | 6 April 2017 06:08 CEST | Updated version of record | https://www.mdpi.com/1424-8220/17/4/771/pdf |
| article pdf uploaded. | 5 April 2017 12:01 CEST | Version of Record | https://www.mdpi.com/1424-8220/17/4/771/pdf-vor |
