| article html file updated | 8 February 2020 07:36 CET | Update | https://www.mdpi.com/2071-1050/9/6/970 |
| article html file updated | 25 September 2019 04:55 CEST | Update | - |
| article html file updated | 3 May 2019 18:44 CEST | Update | - |
| article html file updated | 28 June 2017 14:41 CEST | Update | - |
| article html file updated | 8 June 2017 07:55 CEST | Original file | - |
| article xml uploaded. | 8 June 2017 07:54 CEST | Original file | https://www.mdpi.com/2071-1050/9/6/970/xml |
| article pdf uploaded. | 8 June 2017 07:54 CEST | Updated version of record | https://www.mdpi.com/2071-1050/9/6/970/pdf |
| article pdf uploaded. | 6 June 2017 12:39 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/6/970/pdf-vor |
