| article html file updated | 7 February 2020 22:15 CET | Update | https://www.mdpi.com/2227-9040/5/1/4 |
| article html file updated | 23 September 2019 01:42 CEST | Update | - |
| article html file updated | 4 May 2019 13:32 CEST | Update | - |
| article html file updated | 29 March 2017 10:11 CEST | Update | - |
| article html file updated | 4 February 2017 11:42 CET | Update | - |
| article xml uploaded. | 4 February 2017 11:41 CET | Update | https://www.mdpi.com/2227-9040/5/1/4/xml |
| article xml uploaded. | 4 February 2017 11:41 CET | Update | - |
| article pdf uploaded. | 4 February 2017 11:41 CET | Updated version of record | https://www.mdpi.com/2227-9040/5/1/4/pdf |
| article html file updated | 26 January 2017 03:39 CET | Original file | - |
| article xml uploaded. | 26 January 2017 03:38 CET | Original file | - |
| article pdf uploaded. | 26 January 2017 03:38 CET | Version of Record | https://www.mdpi.com/2227-9040/5/1/4/pdf-vor |
