| article html file updated | 7 February 2020 02:13 CET | Update | https://www.mdpi.com/2079-6439/3/4/575 |
| article html file updated | 6 May 2019 05:00 CEST | Update | N/A |
| article html file updated | 26 March 2019 16:27 CET | Original file | N/A |
| article pdf uploaded. | 15 December 2015 14:33 CET | Version of Record | https://www.mdpi.com/2079-6439/3/4/575/pdf |
