| article html file updated | 7 February 2020 03:43 CET | Update | https://www.mdpi.com/2077-1444/7/1/12 |
| article html file updated | 6 May 2019 02:00 CEST | Update | - |
| article html file updated | 26 March 2019 19:02 CET | Original file | - |
| article pdf uploaded. | 22 January 2016 14:57 CET | Updated version of record | https://www.mdpi.com/2077-1444/7/1/12/pdf |
| article pdf uploaded. | 21 January 2016 11:27 CET | Version of Record | https://www.mdpi.com/2077-1444/7/1/12/pdf-vor |
| article xml uploaded. | 21 January 2016 11:27 CET | Original file | https://www.mdpi.com/2077-1444/7/1/12/xml |
