| article html file updated | 7 February 2020 02:59 CET | Update | https://www.mdpi.com/2071-1050/8/1/40 |
| article html file updated | 6 May 2019 03:25 CEST | Update | - |
| article html file updated | 26 March 2019 17:39 CET | Original file | - |
| article pdf uploaded. | 4 January 2016 13:02 CET | Version of Record | https://www.mdpi.com/2071-1050/8/1/40/pdf |
| article xml uploaded. | 4 January 2016 13:02 CET | Original file | https://www.mdpi.com/2071-1050/8/1/40/xml |
