| article html file updated | 8 February 2020 02:56 CET | Update | https://www.mdpi.com/2071-1050/9/4/549 |
| article html file updated | 24 September 2019 04:11 CEST | Update | - |
| article html file updated | 4 May 2019 03:31 CEST | Update | - |
| article html file updated | 28 April 2017 10:54 CEST | Update | - |
| article html file updated | 5 April 2017 11:34 CEST | Original file | - |
| article xml uploaded. | 5 April 2017 11:33 CEST | Original file | https://www.mdpi.com/2071-1050/9/4/549/xml |
| article pdf uploaded. | 5 April 2017 11:33 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/4/549/pdf |
