| article html file updated | 7 February 2020 02:54 CET | Update | https://www.mdpi.com/2071-1050/8/1/34 |
| article html file updated | 6 May 2019 03:33 CEST | Update | - |
| article html file updated | 26 March 2019 17:33 CET | Original file | - |
| article pdf uploaded. | 31 December 2015 12:23 CET | Version of Record | https://www.mdpi.com/2071-1050/8/1/34/pdf |
| article xml uploaded. | 31 December 2015 12:23 CET | Original file | https://www.mdpi.com/2071-1050/8/1/34/xml |
