| article html file updated | 5 February 2020 20:56 CET | Update | https://www.mdpi.com/2220-9964/1/2/108 |
| article html file updated | 8 May 2019 17:02 CEST | Update | - |
| article html file updated | 25 March 2019 12:17 CET | Update | - |
| article html file updated | 17 June 2015 00:39 CEST | Update | - |
| article html file updated | 9 March 2015 06:39 CET | Update | - |
| article xml file uploaded | 9 March 2015 06:39 CET | Update | https://www.mdpi.com/2220-9964/1/2/108/xml |
| article html file updated | 4 January 2015 11:49 CET | Update | - |
| article xml file uploaded | 4 January 2015 11:49 CET | Original file | - |
| article html file updated | 7 February 2013 13:07 CET | Update | - |
| article html file updated | 7 February 2013 02:59 CET | Update | - |
| article html file updated | 6 February 2013 08:27 CET | Update | - |
| article html file updated | 29 January 2013 04:54 CET | Update | - |
| article html file updated | 26 January 2013 11:32 CET | Update | - |
| article html file updated | 23 January 2013 20:43 CET | Original file | - |
