| article html file updated | 5 February 2020 23:49 CET | Update | https://www.mdpi.com/1424-8247/6/1/54 |
| article html file updated | 8 May 2019 10:14 CEST | Update | - |
| article html file updated | 20 March 2019 16:46 CET | Update | - |
| article html file updated | 17 June 2015 05:16 CEST | Update | - |
| article html file updated | 13 September 2013 17:16 CEST | Update | - |
| article xml file uploaded | 13 September 2013 17:16 CEST | Original file | https://www.mdpi.com/1424-8247/6/1/54/xml |
| article html file updated | 8 February 2013 09:22 CET | Update | - |
| article html file updated | 7 February 2013 17:41 CET | Update | - |
| article html file updated | 24 January 2013 11:53 CET | Original file | - |
