| article html file updated | 6 February 2020 04:51 CET | Update | https://www.mdpi.com/2079-4991/3/4/572 |
| article html file updated | 20 September 2019 01:54 CEST | Update | - |
| article html file updated | 7 May 2019 23:24 CEST | Update | - |
| article html file updated | 21 March 2019 05:52 CET | Update | - |
| article html file updated | 16 February 2017 03:58 CET | Update | - |
| article html file updated | 17 June 2015 13:51 CEST | Original file | - |
| article pdf uploaded. | 14 October 2013 14:37 CEST | Version of Record | https://www.mdpi.com/2079-4991/3/4/572/pdf |
