| article html file updated | 9 February 2020 04:30 CET | Update | https://www.mdpi.com/2075-1702/6/1/4 |
| article html file updated | 30 September 2019 06:27 CEST | Update | - |
| article html file updated | 1 May 2019 23:13 CEST | Update | - |
| article html file updated | 17 April 2019 21:51 CEST | Update | - |
| article html file updated | 28 March 2019 18:41 CET | Update | - |
| article html file updated | 27 March 2018 15:39 CEST | Update | - |
| article html file updated | 29 January 2018 14:09 CET | Original file | - |
| article xml uploaded. | 29 January 2018 14:08 CET | Update | https://www.mdpi.com/2075-1702/6/1/4/xml |
| article xml uploaded. | 29 January 2018 14:08 CET | Update | - |
| article xml uploaded. | 29 January 2018 14:07 CET | Update | - |
| article xml uploaded. | 29 January 2018 14:07 CET | Update | - |
| article xml uploaded. | 29 January 2018 14:07 CET | Update | - |
| article xml uploaded. | 29 January 2018 14:07 CET | Update | - |
| article xml uploaded. | 29 January 2018 14:07 CET | Update | - |
| article xml uploaded. | 29 January 2018 14:07 CET | Update | - |
| article xml uploaded. | 29 January 2018 14:07 CET | Update | - |
| article xml uploaded. | 29 January 2018 14:07 CET | Original file | - |
| article pdf uploaded. | 29 January 2018 14:07 CET | Updated version of record | https://www.mdpi.com/2075-1702/6/1/4/pdf |
| article pdf uploaded. | 26 January 2018 16:23 CET | Version of Record | https://www.mdpi.com/2075-1702/6/1/4/pdf-vor |
