| article html file updated | 6 February 2020 11:46 CET | Update | https://www.mdpi.com/1996-1073/7/9/5548 |
| article html file updated | 7 May 2019 09:10 CEST | Update | - |
| article html file updated | 21 March 2019 23:45 CET | Update | - |
| article html file updated | 20 August 2015 16:29 CEST | Update | - |
| article html file updated | 22 October 2014 07:37 CEST | Original file | - |
| article xml file uploaded | 22 October 2014 07:37 CEST | Original file | https://www.mdpi.com/1996-1073/7/9/5548/xml |
| article pdf uploaded. | 26 August 2014 07:49 CEST | Version of Record | https://www.mdpi.com/1996-1073/7/9/5548/pdf |
