| article html file updated | 6 February 2020 11:42 CET | Update | https://www.mdpi.com/2076-3387/4/3/304 |
| article html file updated | 20 September 2019 12:01 CEST | Update | - |
| article html file updated | 7 May 2019 09:16 CEST | Update | - |
| article html file updated | 21 March 2019 23:38 CET | Update | - |
| article html file updated | 20 August 2015 16:18 CEST | Original file | - |
| article pdf uploaded. | 22 August 2014 11:27 CEST | Version of Record | https://www.mdpi.com/2076-3387/4/3/304/pdf |
