| article html file updated | 6 February 2020 00:48 CET | Update | https://www.mdpi.com/1996-1073/6/3/1298 |
| article html file updated | 8 May 2019 07:47 CEST | Update | - |
| article html file updated | 20 March 2019 19:16 CET | Update | - |
| article html file updated | 13 February 2017 08:44 CET | Original file | - |
| article pdf uploaded. | 4 March 2013 15:34 CET | Version of Record | https://www.mdpi.com/1996-1073/6/3/1298/pdf |
