| article html file updated | 6 February 2020 11:03 CET | Update | https://www.mdpi.com/2076-0752/3/3/303 |
| article html file updated | 20 September 2019 10:57 CEST | Update | - |
| article html file updated | 7 May 2019 10:55 CEST | Update | - |
| article html file updated | 21 March 2019 21:53 CET | Update | - |
| article html file updated | 27 April 2016 04:46 CEST | Original file | - |
| article pdf uploaded. | 29 July 2014 10:24 CEST | Version of Record | https://www.mdpi.com/2076-0752/3/3/303/pdf |
