| article html file updated | 6 February 2020 10:14 CET | Update | https://www.mdpi.com/1424-8247/7/7/754 |
| article html file updated | 7 May 2019 12:33 CEST | Update | N/A |
| article html file updated | 21 March 2019 19:38 CET | Update | N/A |
| article html file updated | 20 August 2015 10:58 CEST | Update | N/A |
| article html file updated | 29 July 2014 11:37 CEST | Update | N/A |
| article xml file uploaded | 29 July 2014 11:37 CEST | Update | https://www.mdpi.com/1424-8247/7/7/754/xml |
| article html file updated | 29 July 2014 06:05 CEST | Original file | N/A |
| article xml file uploaded | 29 July 2014 06:05 CEST | Original file | N/A |
| article pdf uploaded. | 25 June 2014 13:33 CEST | Version of Record | https://www.mdpi.com/1424-8247/7/7/754/pdf |
