| article html file updated | 5 February 2020 14:51 CET | Update | https://www.mdpi.com/1660-3397/8/6/1920 |
| article html file updated | 18 September 2019 23:45 CEST | Update | - |
| article html file updated | 9 May 2019 05:41 CEST | Update | - |
| article html file updated | 20 March 2019 01:16 CET | Update | - |
| article html file updated | 16 June 2015 10:25 CEST | Update | - |
| article html file updated | 14 August 2014 12:06 CEST | Update | - |
| article xml file uploaded | 14 August 2014 12:06 CEST | Original file | https://www.mdpi.com/1660-3397/8/6/1920/xml |
| article html file updated | 6 February 2013 17:55 CET | Update | - |
| article html file updated | 5 February 2013 22:02 CET | Update | - |
| article html file updated | 28 January 2013 19:33 CET | Update | - |
| article html file updated | 25 January 2013 22:43 CET | Update | - |
| article html file updated | 22 January 2013 01:26 CET | Update | - |
| article html file updated | 18 January 2013 07:36 CET | Original file | - |
