| article html file updated | 7 February 2020 19:49 CET | Update | https://www.mdpi.com/2079-6374/6/4/60 |
| article html file updated | 22 September 2019 12:34 CEST | Update | - |
| article html file updated | 4 May 2019 18:48 CEST | Update | - |
| article html file updated | 28 December 2016 10:57 CET | Update | - |
| article html file updated | 21 December 2016 03:56 CET | Update | - |
| article xml uploaded. | 21 December 2016 03:54 CET | Update | https://www.mdpi.com/2079-6374/6/4/60/xml |
| article pdf uploaded. | 21 December 2016 03:54 CET | Updated version of record | https://www.mdpi.com/2079-6374/6/4/60/pdf |
| article html file updated | 16 December 2016 12:49 CET | Original file | - |
| article xml uploaded. | 16 December 2016 12:48 CET | Update | - |
| article xml uploaded. | 16 December 2016 12:48 CET | Original file | - |
| article pdf uploaded. | 16 December 2016 12:48 CET | Version of Record | https://www.mdpi.com/2079-6374/6/4/60/pdf-vor |
