| article html file updated | 6 February 2020 13:43 CET | Update | https://www.mdpi.com/1996-1073/7/11/7602 |
| article html file updated | 7 May 2019 05:21 CEST | Update | N/A |
| article html file updated | 25 March 2019 17:53 CET | Update | N/A |
| article html file updated | 21 August 2015 02:14 CEST | Original file | N/A |
| article pdf uploaded. | 18 November 2014 12:09 CET | Version of Record | https://www.mdpi.com/1996-1073/7/11/7602/pdf |
