| article html file updated | 5 February 2020 19:21 CET | Update | https://www.mdpi.com/2071-1050/4/2/227 |
| article html file updated | 8 May 2019 20:30 CEST | Update | - |
| article html file updated | 25 March 2019 09:13 CET | Update | - |
| article html file updated | 16 June 2015 21:34 CEST | Update | - |
| article html file updated | 14 August 2014 12:06 CEST | Update | - |
| article xml file uploaded | 14 August 2014 12:06 CEST | Original file | https://www.mdpi.com/2071-1050/4/2/227/xml |
| article html file updated | 7 February 2013 10:17 CET | Update | - |
| article html file updated | 7 February 2013 00:35 CET | Update | - |
| article html file updated | 6 February 2013 05:53 CET | Update | - |
| article html file updated | 29 January 2013 01:37 CET | Update | - |
| article html file updated | 26 January 2013 07:59 CET | Update | - |
| article html file updated | 23 January 2013 09:22 CET | Original file | - |
