| article html file updated | 8 February 2020 02:52 CET | Update | https://www.mdpi.com/2071-1050/9/4/541 |
| article html file updated | 4 May 2019 03:40 CEST | Update | - |
| article html file updated | 28 April 2017 10:53 CEST | Update | - |
| article html file updated | 4 April 2017 15:07 CEST | Original file | - |
| article xml uploaded. | 4 April 2017 15:06 CEST | Original file | https://www.mdpi.com/2071-1050/9/4/541/xml |
| article pdf uploaded. | 4 April 2017 15:06 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/4/541/pdf |
