| article html file updated | 7 February 2020 02:01 CET | Update | https://www.mdpi.com/2079-3197/3/4/670 |
| article html file updated | 6 May 2019 05:24 CEST | Update | - |
| article html file updated | 26 March 2019 16:08 CET | Original file | - |
| article pdf uploaded. | 11 December 2015 08:08 CET | Version of Record | https://www.mdpi.com/2079-3197/3/4/670/pdf |
| article xml uploaded. | 11 December 2015 08:08 CET | Original file | https://www.mdpi.com/2079-3197/3/4/670/xml |
