| article html file updated | 5 February 2020 16:20 CET | Update | https://www.mdpi.com/1424-8247/4/1/138 |
| article html file updated | 9 May 2019 02:44 CEST | Update | - |
| article html file updated | 20 March 2019 05:01 CET | Update | - |
| article html file updated | 16 June 2015 13:29 CEST | Update | - |
| 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/1424-8247/4/1/138/xml |
| article html file updated | 6 February 2013 19:25 CET | Update | - |
| article html file updated | 5 February 2013 23:20 CET | Update | - |
| article html file updated | 28 January 2013 20:50 CET | Update | - |
| article html file updated | 26 January 2013 00:29 CET | Update | - |
| article html file updated | 22 January 2013 08:12 CET | Original file | - |
