| article html file updated | 6 February 2020 21:23 CET | Update | https://www.mdpi.com/2075-1680/4/3/321 |
| article html file updated | 6 May 2019 14:20 CEST | Update | - |
| article html file updated | 26 March 2019 08:00 CET | Original file | - |
| article pdf uploaded. | 4 August 2015 15:41 CEST | Version of Record | https://www.mdpi.com/2075-1680/4/3/321/pdf |
