| article html file updated | 6 February 2020 12:29 CET | Update | https://www.mdpi.com/1996-1073/7/9/6223 |
| article html file updated | 20 September 2019 13:16 CEST | Update | N/A |
| article html file updated | 7 May 2019 07:49 CEST | Update | N/A |
| article html file updated | 22 March 2019 01:33 CET | Update | N/A |
| article html file updated | 29 June 2017 13:17 CEST | Update | N/A |
| article html file updated | 20 August 2015 20:59 CEST | Update | N/A |
| article html file updated | 22 October 2014 07:37 CEST | Original file | N/A |
| article xml file uploaded | 22 October 2014 07:37 CEST | Original file | https://www.mdpi.com/1996-1073/7/9/6223/xml |
| article pdf uploaded. | 25 September 2014 14:42 CEST | Version of Record | https://www.mdpi.com/1996-1073/7/9/6223/pdf |
