| article html file updated | 5 February 2020 19:44 CET | Update | https://www.mdpi.com/1999-4923/4/1/212 |
| article html file updated | 8 May 2019 19:41 CEST | Update | - |
| article html file updated | 25 March 2019 09:55 CET | Update | - |
| article html file updated | 16 June 2015 22:23 CEST | Update | - |
| article html file updated | 28 April 2014 11:05 CEST | Update | - |
| article xml file uploaded | 28 April 2014 11:05 CEST | Original file | https://www.mdpi.com/1999-4923/4/1/212/xml |
| article html file updated | 7 February 2013 11:04 CET | Update | - |
| article html file updated | 7 February 2013 01:09 CET | Update | - |
| article html file updated | 6 February 2013 06:33 CET | Update | - |
| article html file updated | 29 January 2013 02:12 CET | Update | - |
| article html file updated | 26 January 2013 08:48 CET | Update | - |
| article html file updated | 23 January 2013 12:36 CET | Original file | - |
