| article html file updated | 7 February 2020 02:52 CET | Update | https://www.mdpi.com/2071-1050/8/1/33 |
| article html file updated | 6 May 2019 03:37 CEST | Update | - |
| article html file updated | 26 March 2019 17:30 CET | Original file | - |
| article pdf uploaded. | 30 December 2015 13:12 CET | Version of Record | https://www.mdpi.com/2071-1050/8/1/33/pdf |
| article xml uploaded. | 30 December 2015 13:12 CET | Original file | https://www.mdpi.com/2071-1050/8/1/33/xml |
