| article html file updated | 8 February 2020 07:45 CET | Update | https://www.mdpi.com/2071-1050/9/6/989 |
| article html file updated | 25 September 2019 05:45 CEST | Update | N/A |
| article html file updated | 3 May 2019 18:26 CEST | Update | N/A |
| article html file updated | 28 June 2017 14:44 CEST | Update | N/A |
| article html file updated | 12 June 2017 09:45 CEST | Original file | N/A |
| article xml uploaded. | 12 June 2017 09:43 CEST | Original file | https://www.mdpi.com/2071-1050/9/6/989/xml |
| article pdf uploaded. | 12 June 2017 09:43 CEST | Updated version of record | https://www.mdpi.com/2071-1050/9/6/989/pdf |
| article pdf uploaded. | 8 June 2017 11:15 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/6/989/pdf-vor |
