| article html file updated | 6 February 2020 05:42 CET | Update | https://www.mdpi.com/1996-1073/6/11/6102 |
| article html file updated | 7 May 2019 21:48 CEST | Update | - |
| article html file updated | 21 March 2019 08:05 CET | Update | - |
| article html file updated | 17 February 2017 06:09 CET | Original file | - |
| article pdf uploaded. | 22 November 2013 09:25 CET | Version of Record | https://www.mdpi.com/1996-1073/6/11/6102/pdf |
