| article html file updated | 5 February 2020 21:49 CET | Update | https://www.mdpi.com/2218-1989/2/3/553 |
| article html file updated | 8 May 2019 15:08 CEST | Update | - |
| article html file updated | 20 March 2019 12:05 CET | Update | - |
| article html file updated | 17 June 2015 02:04 CEST | Update | - |
| article html file updated | 7 January 2014 12:25 CET | Update | - |
| article xml file uploaded | 7 January 2014 12:25 CET | Update | https://www.mdpi.com/2218-1989/2/3/553/xml |
| article html file updated | 30 August 2013 09:14 CEST | Update | - |
| article xml file uploaded | 30 August 2013 09:14 CEST | Original file | - |
| article html file updated | 7 February 2013 14:46 CET | Update | - |
| article html file updated | 7 February 2013 05:48 CET | Update | - |
| article html file updated | 6 February 2013 10:05 CET | Update | - |
| article html file updated | 29 January 2013 06:22 CET | Update | - |
| article html file updated | 24 January 2013 01:18 CET | Original file | - |
