| article html file updated | 5 February 2020 23:50 CET | Update | https://www.mdpi.com/2076-328X/3/1/55 |
| article html file updated | 19 September 2019 16:43 CEST | Update | - |
| article html file updated | 8 May 2019 10:11 CEST | Update | - |
| article html file updated | 20 March 2019 16:50 CET | Update | - |
| article html file updated | 17 June 2015 05:17 CEST | Update | - |
| article html file updated | 26 August 2014 03:57 CEST | Update | - |
| article xml file uploaded | 26 August 2014 03:57 CEST | Update | https://www.mdpi.com/2076-328X/3/1/55/xml |
| article html file updated | 8 February 2013 09:23 CET | Update | - |
| article html file updated | 7 February 2013 17:42 CET | Update | - |
| article html file updated | 24 January 2013 11:55 CET | Update | - |
| article html file updated | 21 January 2013 15:13 CET | Original file | - |
| article xml uploaded. | 21 January 2013 15:13 CET | Original file | - |
