| article html file updated | 5 February 2020 14:17 CET | Update | https://www.mdpi.com/1660-4601/7/4/1831 | 
| article html file updated | 9 May 2019 06:53 CEST | Update | - | 
| article html file updated | 19 March 2019 23:52 CET | Update | - | 
| article html file updated | 16 June 2015 09:25 CEST | Update | - | 
| article html file updated | 14 August 2014 11:41 CEST | Update | - | 
| article xml file uploaded | 14 August 2014 11:41 CEST | Update | https://www.mdpi.com/1660-4601/7/4/1831/xml | 
| article html file updated | 14 August 2014 11:21 CEST | Update | - | 
| article xml file uploaded | 14 August 2014 11:21 CEST | Original file | - | 
| article html file updated | 6 February 2013 17:19 CET | Update | - | 
| article html file updated | 5 February 2013 21:28 CET | Update | - | 
| article html file updated | 28 January 2013 19:00 CET | Update | - | 
| article html file updated | 25 January 2013 21:58 CET | Update | - | 
| article html file updated | 21 January 2013 23:16 CET | Update | - | 
| article html file updated | 18 January 2013 05:32 CET | Original file | - |