| article html file updated | 5 February 2020 23:45 CET | Update | https://www.mdpi.com/1424-8247/6/1/25 |
| article html file updated | 8 May 2019 10:23 CEST | Update | - |
| article html file updated | 20 March 2019 16:37 CET | Update | - |
| article html file updated | 17 June 2015 05:10 CEST | Update | - |
| article html file updated | 14 August 2014 12:04 CEST | Update | - |
| article xml file uploaded | 14 August 2014 12:04 CEST | Update | https://www.mdpi.com/1424-8247/6/1/25/xml |
| article html file updated | 13 September 2013 17:16 CEST | Update | - |
| article xml file uploaded | 13 September 2013 17:16 CEST | Original file | - |
| article html file updated | 8 February 2013 09:21 CET | Update | - |
| article html file updated | 7 February 2013 17:40 CET | Update | - |
| article html file updated | 24 January 2013 11:51 CET | Original file | - |
