| article html file updated | 5 February 2020 17:24 CET | Update | https://www.mdpi.com/2072-6651/3/6/520 |
| article html file updated | 9 May 2019 00:35 CEST | Update | N/A |
| article html file updated | 20 March 2019 07:50 CET | Update | N/A |
| article html file updated | 16 June 2015 16:26 CEST | Update | N/A |
| article html file updated | 14 August 2014 12:06 CEST | Update | N/A |
| article xml file uploaded | 14 August 2014 12:06 CEST | Original file | https://www.mdpi.com/2072-6651/3/6/520/xml |
| article html file updated | 6 February 2013 21:19 CET | Update | N/A |
| article html file updated | 6 February 2013 01:10 CET | Update | N/A |
| article html file updated | 28 January 2013 22:35 CET | Update | N/A |
| article html file updated | 26 January 2013 02:53 CET | Update | N/A |
| article html file updated | 22 January 2013 16:58 CET | Original file | N/A |
