| article html file updated | 5 February 2020 21:58 CET | Update | https://www.mdpi.com/1424-8247/5/9/1021 |
| article html file updated | 8 May 2019 14:48 CEST | Update | N/A |
| article html file updated | 20 March 2019 12:29 CET | Update | N/A |
| article html file updated | 17 June 2015 02:16 CEST | Update | N/A |
| article html file updated | 13 September 2013 17:16 CEST | Update | N/A |
| article xml file uploaded | 13 September 2013 17:16 CEST | Original file | https://www.mdpi.com/1424-8247/5/9/1021/xml |
| article html file updated | 7 February 2013 14:59 CET | Update | N/A |
| article html file updated | 7 February 2013 06:05 CET | Update | N/A |
| article html file updated | 6 February 2013 10:19 CET | Update | N/A |
| article html file updated | 29 January 2013 06:34 CET | Update | N/A |
| article html file updated | 24 January 2013 01:57 CET | Original file | N/A |
