| article html file updated | 6 February 2020 18:46 CET | Update | https://www.mdpi.com/2077-1312/3/2/240 |
| article html file updated | 20 September 2019 21:34 CEST | Update | - |
| article html file updated | 6 May 2019 19:45 CEST | Update | - |
| article html file updated | 26 March 2019 02:55 CET | Update | - |
| article html file updated | 27 October 2017 11:30 CEST | Update | - |
| article html file updated | 21 August 2015 12:19 CEST | Original file | - |
| article pdf uploaded. | 19 May 2015 14:17 CEST | Version of Record | https://www.mdpi.com/2077-1312/3/2/240/pdf |
