| article html file updated | 9 March 2017 22:46 CET | Update | https://www.mdpi.com/1424-8220/13/1/681 |
| article html file updated | 17 June 2015 05:15 CEST | Update | - |
| article html file updated | 30 October 2013 09:15 CET | Update | - |
| article xml file uploaded | 30 October 2013 09:15 CET | Update | https://www.mdpi.com/1424-8220/13/1/681/xml |
| article html file updated | 23 April 2013 14:44 CEST | Update | - |
| article xml file uploaded | 23 April 2013 14:44 CEST | Update | - |
| article html file updated | 26 March 2013 10:51 CET | Update | - |
| article xml file uploaded | 26 March 2013 10:51 CET | Update | - |
| article html file updated | 5 March 2013 16:39 CET | Update | - |
| article xml file uploaded | 5 March 2013 16:38 CET | Update | - |
| article html file updated | 22 February 2013 08:19 CET | Original file | - |
| article xml file uploaded | 22 February 2013 08:19 CET | Original file | - |
