| article html file updated | 8 February 2020 20:29 CET | Update | https://www.mdpi.com/2073-4336/8/4/49 |
| article html file updated | 28 September 2019 06:48 CEST | Update | - |
| article html file updated | 2 May 2019 16:38 CEST | Update | - |
| article html file updated | 8 November 2017 06:44 CET | Original file | - |
| article xml uploaded. | 8 November 2017 06:42 CET | Original file | https://www.mdpi.com/2073-4336/8/4/49/xml |
| article pdf uploaded. | 8 November 2017 06:42 CET | Updated version of record | https://www.mdpi.com/2073-4336/8/4/49/pdf |
| article pdf uploaded. | 6 November 2017 16:15 CET | Version of Record | https://www.mdpi.com/2073-4336/8/4/49/pdf-vor |
