| article html file updated | 16 June 2015 13:33 CEST | Update | https://www.mdpi.com/1424-8247/4/1/169 |
| article html file updated | 11 June 2014 13:28 CEST | Update | - |
| article xml file uploaded | 11 June 2014 13:28 CEST | Original file | https://www.mdpi.com/1424-8247/4/1/169/xml |
| article html file updated | 6 February 2013 19:28 CET | Update | - |
| article html file updated | 5 February 2013 23:22 CET | Update | - |
| article html file updated | 28 January 2013 20:53 CET | Update | - |
| article html file updated | 26 January 2013 00:32 CET | Update | - |
| article html file updated | 22 January 2013 08:25 CET | Original file | - |
