| article html file updated | 6 February 2020 03:07 CET | Update | https://www.mdpi.com/1996-1073/6/7/3392 |
| article html file updated | 8 May 2019 03:02 CEST | Update | - |
| article html file updated | 21 March 2019 01:04 CET | Update | - |
| article html file updated | 13 February 2017 08:45 CET | Original file | - |
| article pdf uploaded. | 11 July 2013 10:43 CEST | Version of Record | https://www.mdpi.com/1996-1073/6/7/3392/pdf |
