| article html file updated | 7 February 2020 01:25 CET | Update | https://www.mdpi.com/2227-7099/3/4/216 |
| article html file updated | 6 May 2019 06:38 CEST | Update | - |
| article html file updated | 26 March 2019 15:08 CET | Original file | - |
| article pdf uploaded. | 30 November 2015 16:46 CET | Updated version of record | https://www.mdpi.com/2227-7099/3/4/216/pdf |
| article pdf uploaded. | 26 November 2015 13:02 CET | Version of Record | https://www.mdpi.com/2227-7099/3/4/216/pdf-vor |
| article xml uploaded. | 26 November 2015 13:02 CET | Original file | https://www.mdpi.com/2227-7099/3/4/216/xml |
