| article html file updated | 6 February 2020 07:36 CET | Update | https://www.mdpi.com/2227-7072/2/1/82 |
| article html file updated | 20 September 2019 06:15 CEST | Update | - |
| article html file updated | 7 May 2019 17:56 CEST | Update | - |
| article html file updated | 21 March 2019 13:10 CET | Update | - |
| article html file updated | 19 August 2015 22:07 CEST | Original file | - |
| article pdf uploaded. | 28 February 2014 11:45 CET | Version of Record | https://www.mdpi.com/2227-7072/2/1/82/pdf |
