| article html file updated | 8 February 2020 03:57 CET | Update | https://www.mdpi.com/2071-1050/9/4/647 |
| article html file updated | 24 September 2019 09:54 CEST | Update | - |
| article html file updated | 4 May 2019 01:32 CEST | Update | - |
| article html file updated | 28 April 2017 11:10 CEST | Original file | - |
| article xml uploaded. | 19 April 2017 15:09 CEST | Original file | https://www.mdpi.com/2071-1050/9/4/647/xml |
| article pdf uploaded. | 19 April 2017 15:09 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/4/647/pdf |
