| article html file updated | 8 February 2020 06:59 CET | Update | https://www.mdpi.com/2071-1050/9/6/901 |
| article html file updated | 25 September 2019 01:46 CEST | Update | - |
| article html file updated | 3 May 2019 19:54 CEST | Update | - |
| article html file updated | 28 June 2017 14:33 CEST | Update | - |
| article html file updated | 29 May 2017 12:06 CEST | Original file | - |
| article xml uploaded. | 29 May 2017 12:05 CEST | Original file | https://www.mdpi.com/2071-1050/9/6/901/xml |
| article pdf uploaded. | 29 May 2017 12:05 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/6/901/pdf |
