| article html file updated | 5 February 2020 22:14 CET | Update | https://www.mdpi.com/2076-3417/2/4/682 |
| article html file updated | 8 May 2019 14:11 CEST | Update | - |
| article html file updated | 20 March 2019 13:11 CET | Update | - |
| article html file updated | 25 July 2017 05:01 CEST | Update | - |
| article xml uploaded. | 25 July 2017 05:00 CEST | Update | https://www.mdpi.com/2076-3417/2/4/682/xml |
| article html file updated | 25 July 2017 04:45 CEST | Update | - |
| article html file updated | 17 June 2015 02:45 CEST | Update | - |
| article html file updated | 7 February 2013 15:29 CET | Update | - |
| article html file updated | 24 January 2013 03:48 CET | Original file | - |
