| article html file updated | 5 February 2020 18:39 CET | Update | https://www.mdpi.com/1660-3397/9/11/2423 |
| article html file updated | 8 May 2019 21:58 CEST | Update | - |
| article html file updated | 20 March 2019 10:55 CET | Update | - |
| article html file updated | 16 June 2015 20:03 CEST | Update | - |
| article html file updated | 14 August 2014 12:04 CEST | Update | - |
| article xml file uploaded | 14 August 2014 12:04 CEST | Original file | https://www.mdpi.com/1660-3397/9/11/2423/xml |
| article html file updated | 6 February 2013 23:34 CET | Update | - |
| article html file updated | 6 February 2013 03:58 CET | Update | - |
| article html file updated | 29 January 2013 00:38 CET | Update | - |
| article html file updated | 26 January 2013 06:20 CET | Update | - |
| article html file updated | 23 January 2013 02:30 CET | Original file | - |
