| article html file updated | 7 February 2020 01:43 CET | Update | https://www.mdpi.com/2075-1729/5/4/1687 |
| article html file updated | 6 May 2019 06:02 CEST | Update | - |
| article html file updated | 26 March 2019 15:39 CET | Original file | - |
| article pdf uploaded. | 3 December 2015 14:07 CET | Version of Record | https://www.mdpi.com/2075-1729/5/4/1687/pdf |
| article xml uploaded. | 3 December 2015 14:07 CET | Original file | https://www.mdpi.com/2075-1729/5/4/1687/xml |
