| article html file updated | 6 February 2020 10:27 CET | Update | https://www.mdpi.com/1424-2818/6/3/396 |
| article html file updated | 7 May 2019 12:08 CEST | Update | N/A |
| article html file updated | 21 March 2019 20:11 CET | Update | N/A |
| article html file updated | 20 August 2015 11:50 CEST | Original file | N/A |
| article pdf uploaded. | 3 July 2014 14:23 CEST | Version of Record | https://www.mdpi.com/1424-2818/6/3/396/pdf |
