| article html file updated | 7 February 2020 01:45 CET | Update | https://www.mdpi.com/2227-9091/3/4/543 |
| article html file updated | 6 May 2019 05:56 CEST | Update | N/A |
| article html file updated | 26 March 2019 15:44 CET | Original file | N/A |
| article pdf uploaded. | 4 December 2015 09:24 CET | Version of Record | https://www.mdpi.com/2227-9091/3/4/543/pdf |
| article xml uploaded. | 4 December 2015 09:24 CET | Original file | https://www.mdpi.com/2227-9091/3/4/543/xml |
