| article html file updated | 5 February 2020 19:26 CET | Update | https://www.mdpi.com/2076-2615/2/1/38 |
| article html file updated | 8 May 2019 20:21 CEST | Update | - |
| article html file updated | 25 March 2019 09:22 CET | Update | - |
| article html file updated | 29 June 2015 04:16 CEST | Update | - |
| article xml file uploaded | 29 June 2015 04:16 CEST | Update | https://www.mdpi.com/2076-2615/2/1/38/xml |
| article html file updated | 16 June 2015 21:44 CEST | Update | - |
| article html file updated | 16 December 2014 11:17 CET | Update | - |
| article xml file uploaded | 16 December 2014 11:17 CET | Update | - |
| article html file updated | 18 November 2014 07:56 CET | Update | - |
| article xml file uploaded | 18 November 2014 07:56 CET | Original file | - |
| article html file updated | 7 February 2013 10:29 CET | Update | - |
| article html file updated | 7 February 2013 00:43 CET | Update | - |
| article html file updated | 6 February 2013 06:02 CET | Update | - |
| article html file updated | 29 January 2013 01:44 CET | Update | - |
| article html file updated | 26 January 2013 08:09 CET | Update | - |
| article html file updated | 23 January 2013 10:01 CET | Original file | - |
