| article html file updated | 6 February 2020 15:34 CET | Update | https://www.mdpi.com/1996-1944/8/2/451 |
| article html file updated | 7 May 2019 01:42 CEST | Update | N/A |
| article html file updated | 25 March 2019 21:08 CET | Update | N/A |
| article html file updated | 21 August 2015 06:44 CEST | Original file | N/A |
| article pdf uploaded. | 29 January 2015 13:09 CET | Version of Record | https://www.mdpi.com/1996-1944/8/2/451/pdf |
