| article html file updated | 6 February 2020 10:58 CET | Update | https://www.mdpi.com/1996-1073/7/8/4757 |
| article html file updated | 7 May 2019 11:05 CEST | Update | N/A |
| article html file updated | 21 March 2019 21:41 CET | Update | N/A |
| article html file updated | 20 August 2015 13:37 CEST | Update | N/A |
| article html file updated | 5 September 2014 10:32 CEST | Original file | N/A |
| article xml file uploaded | 5 September 2014 10:32 CEST | Original file | https://www.mdpi.com/1996-1073/7/8/4757/xml |
| article pdf uploaded. | 24 July 2014 13:24 CEST | Version of Record | https://www.mdpi.com/1996-1073/7/8/4757/pdf |
