| article html file updated | 7 February 2020 04:35 CET | Update | https://www.mdpi.com/2071-1050/8/2/171 |
| article html file updated | 6 May 2019 00:17 CEST | Update | - |
| article html file updated | 26 March 2019 20:47 CET | Original file | - |
| article pdf uploaded. | 24 February 2016 08:39 CET | Updated version of record | https://www.mdpi.com/2071-1050/8/2/171/pdf |
| article pdf uploaded. | 16 February 2016 08:56 CET | Version of Record | https://www.mdpi.com/2071-1050/8/2/171/pdf-vor |
| article xml uploaded. | 16 February 2016 08:56 CET | Original file | https://www.mdpi.com/2071-1050/8/2/171/xml |
