| article html file updated | 6 February 2020 09:42 CET | Update | https://www.mdpi.com/2076-0760/3/2/272 |
| article html file updated | 20 September 2019 08:53 CEST | Update | - |
| article html file updated | 7 May 2019 13:39 CEST | Update | - |
| article html file updated | 21 March 2019 18:09 CET | Update | - |
| article html file updated | 22 March 2017 10:29 CET | Original file | - |
| article pdf uploaded. | 5 June 2014 14:29 CEST | Updated version of record | https://www.mdpi.com/2076-0760/3/2/272/pdf |
| article pdf uploaded. | 4 June 2014 10:30 CEST | Version of Record | https://www.mdpi.com/2076-0760/3/2/272/pdf-vor |
