| article html file updated | 7 February 2020 03:11 CET | Update | https://www.mdpi.com/2071-1050/8/1/49 |
| article html file updated | 6 May 2019 03:02 CEST | Update | - |
| article html file updated | 26 March 2019 17:58 CET | Original file | - |
| article pdf uploaded. | 8 January 2016 13:20 CET | Version of Record | https://www.mdpi.com/2071-1050/8/1/49/pdf |
| article xml uploaded. | 8 January 2016 13:20 CET | Original file | https://www.mdpi.com/2071-1050/8/1/49/xml |
