| article html file updated | 6 February 2020 00:41 CET | Update | https://www.mdpi.com/1996-1073/6/3/1198 |
| article html file updated | 8 May 2019 08:07 CEST | Update | - |
| article html file updated | 20 March 2019 18:57 CET | Update | - |
| article html file updated | 4 February 2017 05:32 CET | Original file | - |
| article pdf uploaded. | 25 February 2013 15:15 CET | Version of Record | https://www.mdpi.com/1996-1073/6/3/1198/pdf |
