| article html file updated | 6 February 2020 14:41 CET | Update | https://www.mdpi.com/2071-1050/7/1/23 |
| article html file updated | 20 September 2019 16:18 CEST | Update | N/A |
| article html file updated | 7 May 2019 03:30 CEST | Update | N/A |
| article html file updated | 25 March 2019 19:41 CET | Update | N/A |
| article html file updated | 21 August 2015 04:39 CEST | Original file | N/A |
| article pdf uploaded. | 23 December 2014 13:50 CET | Version of Record | https://www.mdpi.com/2071-1050/7/1/23/pdf |
