| article html file updated | 7 February 2020 18:45 CET | Update | https://www.mdpi.com/2075-5309/6/4/49 |
| article html file updated | 22 September 2019 07:31 CEST | Update | - |
| article html file updated | 4 May 2019 21:03 CEST | Update | - |
| article html file updated | 29 December 2016 06:12 CET | Update | - |
| article html file updated | 29 November 2016 10:33 CET | Original file | - |
| article xml uploaded. | 29 November 2016 10:31 CET | Update | https://www.mdpi.com/2075-5309/6/4/49/xml |
| article xml uploaded. | 29 November 2016 10:31 CET | Original file | - |
| article pdf uploaded. | 29 November 2016 10:31 CET | Version of Record | https://www.mdpi.com/2075-5309/6/4/49/pdf |
