| article html file updated | 7 February 2020 02:05 CET | Update | https://www.mdpi.com/2227-9040/3/4/284 |
| article html file updated | 6 May 2019 05:16 CEST | Update | - |
| article html file updated | 26 March 2019 16:15 CET | Original file | - |
| article pdf uploaded. | 11 December 2015 13:38 CET | Version of Record | https://www.mdpi.com/2227-9040/3/4/284/pdf |
| article xml uploaded. | 11 December 2015 13:38 CET | Original file | https://www.mdpi.com/2227-9040/3/4/284/xml |
