| article html file updated | 5 February 2020 21:21 CET | Update | https://www.mdpi.com/2079-7737/1/2/260 |
| article html file updated | 8 May 2019 16:07 CEST | Update | - |
| article html file updated | 25 March 2019 13:06 CET | Update | - |
| article html file updated | 17 June 2015 01:20 CEST | Update | - |
| article html file updated | 28 April 2014 10:22 CEST | Update | - |
| article xml file uploaded | 28 April 2014 10:22 CEST | Original file | https://www.mdpi.com/2079-7737/1/2/260/xml |
| article html file updated | 7 February 2013 13:53 CET | Update | - |
| article html file updated | 7 February 2013 04:51 CET | Update | - |
| article html file updated | 6 February 2013 09:16 CET | Update | - |
| article html file updated | 29 January 2013 05:37 CET | Update | - |
| article html file updated | 26 January 2013 17:35 CET | Update | - |
| article html file updated | 23 January 2013 22:53 CET | Original file | - |
