| article html file updated | 6 February 2020 09:45 CET | Update | https://www.mdpi.com/2306-5354/1/2/111 |
| article html file updated | 20 September 2019 08:56 CEST | Update | - |
| article html file updated | 7 May 2019 13:34 CEST | Update | - |
| article html file updated | 21 March 2019 18:15 CET | Update | - |
| article html file updated | 13 February 2017 08:40 CET | Update | - |
| article html file updated | 20 August 2015 09:08 CEST | Original file | - |
| article pdf uploaded. | 5 June 2014 13:33 CEST | Version of Record | https://www.mdpi.com/2306-5354/1/2/111/pdf |
