| article html file updated | 5 February 2020 20:49 CET | Update | https://www.mdpi.com/2071-1050/4/6/1292 |
| article html file updated | 19 September 2019 11:11 CEST | Update | N/A |
| article html file updated | 8 May 2019 17:17 CEST | Update | N/A |
| article html file updated | 25 March 2019 12:03 CET | Update | N/A |
| article html file updated | 17 June 2015 00:29 CEST | Update | N/A |
| article html file updated | 7 February 2013 12:56 CET | Update | N/A |
| article html file updated | 7 February 2013 02:49 CET | Update | N/A |
| article html file updated | 6 February 2013 08:17 CET | Update | N/A |
| article html file updated | 29 January 2013 04:41 CET | Update | N/A |
| article html file updated | 26 January 2013 11:15 CET | Update | N/A |
| article html file updated | 23 January 2013 20:00 CET | Original file | N/A |
