| article html file updated | 6 February 2020 07:54 CET | Update | https://www.mdpi.com/2073-4441/6/3/455 |
| article html file updated | 7 May 2019 17:20 CEST | Update | - |
| article html file updated | 21 March 2019 13:51 CET | Update | - |
| article html file updated | 19 August 2015 23:42 CEST | Original file | - |
| article pdf uploaded. | 13 March 2014 14:10 CET | Version of Record | https://www.mdpi.com/2073-4441/6/3/455/pdf |
