| article html file updated | 9 February 2020 02:51 CET | Update | https://www.mdpi.com/2075-4434/6/1/9 |
| article html file updated | 2 May 2019 02:39 CEST | Update | - |
| article html file updated | 18 April 2019 00:52 CEST | Update | - |
| article html file updated | 28 March 2019 15:06 CET | Update | - |
| article html file updated | 27 March 2018 12:39 CEST | Update | - |
| article html file updated | 12 January 2018 15:11 CET | Original file | - |
| article xml uploaded. | 12 January 2018 15:10 CET | Original file | https://www.mdpi.com/2075-4434/6/1/9/xml |
| article pdf uploaded. | 12 January 2018 15:10 CET | Version of Record | https://www.mdpi.com/2075-4434/6/1/9/pdf |
