| article html file updated | 8 February 2020 03:17 CET | Update | https://www.mdpi.com/1424-8220/17/4/821 |
| article html file updated | 24 September 2019 06:08 CEST | Update | - |
| article html file updated | 4 May 2019 02:46 CEST | Update | - |
| article html file updated | 29 April 2017 14:04 CEST | Update | - |
| article html file updated | 11 April 2017 14:16 CEST | Original file | - |
| article xml uploaded. | 11 April 2017 14:15 CEST | Update | https://www.mdpi.com/1424-8220/17/4/821/xml |
| article pdf uploaded. | 11 April 2017 14:15 CEST | Updated version of record | https://www.mdpi.com/1424-8220/17/4/821/pdf |
| article pdf uploaded. | 10 April 2017 13:59 CEST | Version of Record | https://www.mdpi.com/1424-8220/17/4/821/pdf-vor |
