| article html file updated | 5 February 2020 10:38 CET | Update | https://www.mdpi.com/1660-4601/4/2/81 |
| article html file updated | 9 May 2019 14:47 CEST | Update | - |
| article html file updated | 19 March 2019 15:08 CET | Update | - |
| article html file updated | 3 September 2013 12:13 CEST | Update | - |
| article xml file uploaded | 3 September 2013 12:13 CEST | Update | https://www.mdpi.com/1660-4601/4/2/81/xml |
| article html file updated | 31 July 2013 09:14 CEST | Original file | - |
| article xml file uploaded | 31 July 2013 09:14 CEST | Original file | - |
