| article html file updated | 6 February 2020 07:52 CET | Update | https://www.mdpi.com/2226-4787/2/1/124 |
| article html file updated | 20 September 2019 06:32 CEST | Update | - |
| article html file updated | 7 May 2019 17:23 CEST | Update | - |
| article html file updated | 21 March 2019 13:48 CET | Update | - |
| article html file updated | 19 August 2015 23:35 CEST | Original file | - |
| article pdf uploaded. | 12 March 2014 11:46 CET | Version of Record | https://www.mdpi.com/2226-4787/2/1/124/pdf |
