| article html file updated | 7 February 2020 00:29 CET | Update | https://www.mdpi.com/2076-3271/3/4/104 |
| article html file updated | 6 May 2019 07:55 CEST | Update | - |
| article html file updated | 26 March 2019 13:53 CET | Original file | - |
| article pdf uploaded. | 2 November 2015 14:33 CET | Version of Record | https://www.mdpi.com/2076-3271/3/4/104/pdf |
