| article html file updated | 6 February 2020 09:26 CET | Update | https://www.mdpi.com/2304-6732/1/2/146 |
| article html file updated | 7 May 2019 14:11 CEST | Update | - |
| article html file updated | 21 March 2019 17:29 CET | Update | - |
| article html file updated | 20 August 2015 08:00 CEST | Original file | - |
| article pdf uploaded. | 26 May 2014 09:05 CEST | Updated version of record | https://www.mdpi.com/2304-6732/1/2/146/pdf |
| article pdf uploaded. | 22 May 2014 15:39 CEST | Version of Record | https://www.mdpi.com/2304-6732/1/2/146/pdf-vor |
