| article html file updated | 8 February 2020 02:32 CET | Update | https://www.mdpi.com/1424-8220/17/4/709 |
| article html file updated | 24 September 2019 01:51 CEST | Update | - |
| article html file updated | 4 May 2019 04:25 CEST | Update | - |
| article html file updated | 29 April 2017 13:37 CEST | Update | - |
| article html file updated | 30 March 2017 09:36 CEST | Original file | - |
| article xml uploaded. | 30 March 2017 09:34 CEST | Update | https://www.mdpi.com/1424-8220/17/4/709/xml |
| article pdf uploaded. | 30 March 2017 09:34 CEST | Updated version of record | https://www.mdpi.com/1424-8220/17/4/709/pdf |
| article pdf uploaded. | 29 March 2017 13:59 CEST | Version of Record | https://www.mdpi.com/1424-8220/17/4/709/pdf-vor |
