| article html file updated | 6 February 2020 15:58 CET | Update | https://www.mdpi.com/1996-1073/8/2/1406 |
| article html file updated | 7 May 2019 00:58 CEST | Update | N/A |
| article html file updated | 25 March 2019 21:47 CET | Update | N/A |
| article html file updated | 21 August 2015 07:41 CEST | Original file | N/A |
| article pdf uploaded. | 13 February 2015 13:30 CET | Version of Record | https://www.mdpi.com/1996-1073/8/2/1406/pdf |
