| article html file updated | 7 February 2020 03:30 CET | Update | https://www.mdpi.com/2071-1050/8/1/80 |
| article html file updated | 6 May 2019 02:27 CEST | Update | - |
| article html file updated | 26 March 2019 18:36 CET | Original file | - |
| article pdf uploaded. | 16 January 2016 07:03 CET | Version of Record | https://www.mdpi.com/2071-1050/8/1/80/pdf |
| article xml uploaded. | 16 January 2016 07:03 CET | Original file | https://www.mdpi.com/2071-1050/8/1/80/xml |
