| article html file updated | 7 February 2020 02:28 CET | Update | https://www.mdpi.com/2077-1312/3/4/1568 |
| article html file updated | 6 May 2019 04:29 CEST | Update | - |
| article html file updated | 26 March 2019 16:52 CET | Update | - |
| article html file updated | 10 November 2017 07:48 CET | Update | - |
| article html file updated | 9 November 2017 10:57 CET | Original file | - |
| article pdf uploaded. | 21 December 2015 15:38 CET | Version of Record | https://www.mdpi.com/2077-1312/3/4/1568/pdf |
| article xml uploaded. | 21 December 2015 15:38 CET | Original file | https://www.mdpi.com/2077-1312/3/4/1568/xml |
