| article html file updated | 5 February 2020 23:57 CET | Update | https://www.mdpi.com/2079-7737/2/1/142 |
| article html file updated | 8 May 2019 09:54 CEST | Update | - |
| article html file updated | 20 March 2019 17:06 CET | Update | - |
| article html file updated | 17 June 2015 05:29 CEST | Update | - |
| article html file updated | 18 July 2014 03:52 CEST | Update | - |
| article xml file uploaded | 18 July 2014 03:52 CEST | Original file | https://www.mdpi.com/2079-7737/2/1/142/xml |
| article html file updated | 8 February 2013 09:29 CET | Update | - |
| article html file updated | 7 February 2013 17:48 CET | Update | - |
| article html file updated | 24 January 2013 12:14 CET | Original file | - |
