| article html file updated | 5 February 2020 14:51 CET | Update | https://www.mdpi.com/1424-8247/3/7/1988 |
| article html file updated | 9 May 2019 05:39 CEST | Update | - |
| article html file updated | 20 March 2019 01:19 CET | Update | - |
| article html file updated | 16 June 2015 10:27 CEST | Update | - |
| article html file updated | 5 June 2014 09:15 CEST | Update | - |
| article xml file uploaded | 5 June 2014 09:15 CEST | Update | https://www.mdpi.com/1424-8247/3/7/1988/xml |
| article html file updated | 5 June 2014 09:09 CEST | Original file | - |
| article xml file uploaded | 5 June 2014 09:09 CEST | Original file | - |
