| article html file updated | 8 February 2020 07:51 CET | Update | https://www.mdpi.com/2071-1050/9/6/994 |
| article html file updated | 3 May 2019 18:15 CEST | Update | N/A |
| article html file updated | 28 June 2017 14:45 CEST | Update | N/A |
| article html file updated | 9 June 2017 11:32 CEST | Original file | N/A |
| article xml uploaded. | 9 June 2017 11:31 CEST | Original file | https://www.mdpi.com/2071-1050/9/6/994/xml |
| article pdf uploaded. | 9 June 2017 11:31 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/6/994/pdf |
