| article html file updated | 5 February 2020 14:07 CET | Update | https://www.mdpi.com/1999-4915/2/4/939 |
| article html file updated | 9 May 2019 07:15 CEST | Update | - |
| article html file updated | 19 March 2019 23:29 CET | Update | - |
| article html file updated | 16 June 2015 09:06 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/1999-4915/2/4/939/xml |
| article html file updated | 6 February 2013 17:07 CET | Update | - |
| article html file updated | 5 February 2013 21:17 CET | Update | - |
| article html file updated | 28 January 2013 18:50 CET | Update | - |
| article html file updated | 25 January 2013 21:45 CET | Update | - |
| article html file updated | 21 January 2013 22:31 CET | Update | - |
| article html file updated | 18 January 2013 04:44 CET | Original file | - |
