| article html file updated | 5 February 2020 22:46 CET | Update | https://www.mdpi.com/2075-1729/2/4/313 |
| article html file updated | 8 May 2019 12:48 CEST | Update | - |
| article html file updated | 20 March 2019 14:28 CET | Update | - |
| article html file updated | 17 June 2015 03:39 CEST | Update | - |
| article html file updated | 24 July 2014 10:31 CEST | Update | - |
| article xml file uploaded | 24 July 2014 10:31 CEST | Original file | https://www.mdpi.com/2075-1729/2/4/313/xml |
| article html file updated | 7 February 2013 16:26 CET | Update | - |
| article html file updated | 24 January 2013 07:20 CET | Original file | - |
