| article html file updated | 5 February 2020 09:32 CET | Update | https://www.mdpi.com/1422-0067/8/6/541 |
| article html file updated | 9 May 2019 17:02 CEST | Update | - |
| article html file updated | 19 March 2019 12:35 CET | Update | - |
| article html file updated | 22 August 2013 08:58 CEST | Update | - |
| article xml file uploaded | 22 August 2013 08:58 CEST | Update | https://www.mdpi.com/1422-0067/8/6/541/xml |
| article html file updated | 19 July 2013 09:00 CEST | Original file | - |
| article xml file uploaded | 19 July 2013 09:00 CEST | Original file | - |
