| article html file updated | 6 February 2020 10:15 CET | Update | https://www.mdpi.com/2227-9075/1/3/96 |
| article html file updated | 7 May 2019 12:32 CEST | Update | N/A |
| article html file updated | 21 March 2019 19:39 CET | Update | N/A |
| article html file updated | 20 August 2015 10:59 CEST | Original file | N/A |
| article pdf uploaded. | 25 June 2014 14:19 CEST | Version of Record | https://www.mdpi.com/2227-9075/1/3/96/pdf |
