| article html file updated | 7 February 2020 18:48 CET | Update | https://www.mdpi.com/2077-1444/7/12/139 |
| article html file updated | 4 May 2019 20:57 CEST | Update | - |
| article html file updated | 28 December 2016 10:39 CET | Update | - |
| article html file updated | 30 November 2016 07:13 CET | Original file | - |
| article xml uploaded. | 30 November 2016 07:12 CET | Update | https://www.mdpi.com/2077-1444/7/12/139/xml |
| article xml uploaded. | 30 November 2016 07:12 CET | Original file | - |
| article pdf uploaded. | 30 November 2016 07:12 CET | Version of Record | https://www.mdpi.com/2077-1444/7/12/139/pdf |
