| article html file updated | 9 February 2020 01:43 CET | Update | https://www.mdpi.com/2073-4344/8/1/9 |
| article html file updated | 29 September 2019 14:41 CEST | Update | - |
| article html file updated | 2 May 2019 05:01 CEST | Update | - |
| article html file updated | 18 April 2019 03:04 CEST | Update | - |
| article html file updated | 28 March 2019 12:25 CET | Update | - |
| article html file updated | 1 February 2018 10:05 CET | Update | - |
| article html file updated | 2 January 2018 20:45 CET | Original file | - |
| article xml uploaded. | 2 January 2018 11:12 CET | Update | https://www.mdpi.com/2073-4344/8/1/9/xml |
| article pdf uploaded. | 2 January 2018 11:12 CET | Updated version of record | https://www.mdpi.com/2073-4344/8/1/9/pdf |
| article pdf uploaded. | 1 January 2018 11:30 CET | Version of Record | https://www.mdpi.com/2073-4344/8/1/9/pdf-vor |
