| article html file updated | 7 February 2020 14:02 CET | Update | https://www.mdpi.com/2076-2615/6/9/52 |
| article html file updated | 5 May 2019 05:49 CEST | Update | - |
| article html file updated | 27 March 2019 15:08 CET | Update | - |
| article html file updated | 26 September 2016 08:34 CEST | Update | - |
| article html file updated | 29 August 2016 10:20 CEST | Original file | - |
| article xml uploaded. | 29 August 2016 10:19 CEST | Original file | https://www.mdpi.com/2076-2615/6/9/52/xml |
| article pdf uploaded. | 29 August 2016 10:19 CEST | Version of Record | https://www.mdpi.com/2076-2615/6/9/52/pdf |
