| article html file updated | 8 February 2020 18:13 CET | Update | https://www.mdpi.com/1424-2818/9/4/44 |
| article html file updated | 27 September 2019 16:45 CEST | Update | - |
| article html file updated | 2 May 2019 21:51 CEST | Update | - |
| article html file updated | 2 January 2018 16:58 CET | Update | - |
| article html file updated | 20 October 2017 11:50 CEST | Update | - |
| article xml uploaded. | 20 October 2017 11:49 CEST | Update | https://www.mdpi.com/1424-2818/9/4/44/xml |
| article pdf uploaded. | 20 October 2017 11:49 CEST | Updated version of record | https://www.mdpi.com/1424-2818/9/4/44/pdf |
| article html file updated | 12 October 2017 09:35 CEST | Original file | - |
| article xml uploaded. | 12 October 2017 09:34 CEST | Original file | - |
| article pdf uploaded. | 12 October 2017 09:34 CEST | Version of Record | https://www.mdpi.com/1424-2818/9/4/44/pdf-vor |
