| article html file updated | 5 February 2020 16:22 CET | Update | https://www.mdpi.com/1660-4601/8/1/117 | 
| article html file updated | 9 May 2019 02:38 CEST | Update | - | 
| article html file updated | 20 March 2019 05:07 CET | Update | - | 
| article html file updated | 16 June 2015 13:36 CEST | Update | - | 
| article html file updated | 14 August 2014 11:42 CEST | Update | - | 
| article xml file uploaded | 14 August 2014 11:42 CEST | Update | https://www.mdpi.com/1660-4601/8/1/117/xml | 
| article html file updated | 14 August 2014 11:22 CEST | Update | - | 
| article xml file uploaded | 14 August 2014 11:22 CEST | Original file | - | 
| article html file updated | 6 February 2013 19:30 CET | Update | - | 
| article html file updated | 5 February 2013 23:25 CET | Update | - | 
| article html file updated | 28 January 2013 20:56 CET | Update | - | 
| article html file updated | 26 January 2013 00:36 CET | Update | - | 
| article html file updated | 22 January 2013 08:34 CET | Original file | - |