| article html file updated | 5 February 2020 17:21 CET | Update | https://www.mdpi.com/1422-0067/12/6/3422 |
| article html file updated | 9 May 2019 00:41 CEST | Update | - |
| article html file updated | 20 March 2019 07:42 CET | Update | - |
| article html file updated | 16 June 2015 16:18 CEST | Update | - |
| article html file updated | 6 February 2013 21:13 CET | Update | - |
| article html file updated | 6 February 2013 01:04 CET | Update | - |
| article html file updated | 28 January 2013 22:30 CET | Update | - |
| article html file updated | 26 January 2013 02:46 CET | Update | - |
| article html file updated | 22 January 2013 16:37 CET | Original file | - |