| article html file updated | 9 February 2020 02:13 CET | Update | https://www.mdpi.com/2076-0760/7/1/9 |
| article html file updated | 2 May 2019 03:59 CEST | Update | - |
| article html file updated | 18 April 2019 02:06 CEST | Update | - |
| article html file updated | 28 March 2019 13:35 CET | Update | - |
| article html file updated | 6 January 2018 10:43 CET | Original file | - |
| article xml uploaded. | 6 January 2018 10:42 CET | Original file | https://www.mdpi.com/2076-0760/7/1/9/xml |
| article pdf uploaded. | 6 January 2018 10:42 CET | Version of Record | https://www.mdpi.com/2076-0760/7/1/9/pdf |
