| article html file updated | 5 February 2020 21:16 CET | Update | https://www.mdpi.com/1422-0067/13/8/9400 |
| article html file updated | 8 May 2019 16:19 CEST | Update | - |
| article html file updated | 20 March 2019 11:28 CET | Update | - |
| article html file updated | 17 June 2015 01:11 CEST | Update | - |
| article html file updated | 7 February 2013 13:42 CET | Update | - |
| article html file updated | 7 February 2013 04:12 CET | Update | - |
| article html file updated | 6 February 2013 09:02 CET | Update | - |
| article html file updated | 29 January 2013 05:26 CET | Update | - |
| article html file updated | 26 January 2013 13:55 CET | Update | - |
| article html file updated | 23 January 2013 22:25 CET | Original file | - |