| article html file updated | 6 February 2020 05:13 CET | Update | https://www.mdpi.com/1996-1073/6/11/5676 |
| article html file updated | 7 May 2019 22:43 CEST | Update | N/A |
| article html file updated | 21 March 2019 06:50 CET | Update | N/A |
| article html file updated | 14 February 2017 11:36 CET | Original file | N/A |
| article pdf uploaded. | 1 November 2013 14:38 CET | Updated version of record | https://www.mdpi.com/1996-1073/6/11/5676/pdf |
| article pdf uploaded. | 29 October 2013 14:58 CET | Version of Record | https://www.mdpi.com/1996-1073/6/11/5676/pdf-vor |
