| article html file updated | 7 February 2020 13:48 CET | Update | https://www.mdpi.com/2071-1050/8/9/840 |
| article html file updated | 5 May 2019 06:14 CEST | Update | N/A |
| article html file updated | 27 March 2019 14:37 CET | Update | N/A |
| article html file updated | 27 September 2016 05:06 CEST | Update | N/A |
| article html file updated | 24 August 2016 13:54 CEST | Original file | N/A |
| article xml uploaded. | 24 August 2016 13:53 CEST | Original file | https://www.mdpi.com/2071-1050/8/9/840/xml |
| article pdf uploaded. | 24 August 2016 13:53 CEST | Version of Record | https://www.mdpi.com/2071-1050/8/9/840/pdf |
