| article html file updated | 6 February 2020 16:36 CET | Update | https://www.mdpi.com/1996-1073/8/3/2066 |
| article html file updated | 6 May 2019 23:48 CEST | Update | - |
| article html file updated | 25 March 2019 22:55 CET | Update | - |
| article html file updated | 21 August 2015 08:45 CEST | Original file | - |
| article pdf uploaded. | 13 March 2015 11:28 CET | Version of Record | https://www.mdpi.com/1996-1073/8/3/2066/pdf |
