| article html file updated | 5 February 2020 15:19 CET | Update | https://www.mdpi.com/1424-8247/3/9/2768 |
| article html file updated | 9 May 2019 04:41 CEST | Update | N/A |
| article html file updated | 20 March 2019 02:38 CET | Update | N/A |
| article html file updated | 16 June 2015 11:29 CEST | Update | N/A |
| article html file updated | 5 June 2014 09:35 CEST | Original file | N/A |
| article xml file uploaded | 5 June 2014 09:35 CEST | Original file | https://www.mdpi.com/1424-8247/3/9/2768/xml |
