| article html file updated | 7 February 2020 22:04 CET | Update | https://www.mdpi.com/2073-4441/9/1/69 |
| article html file updated | 23 September 2019 00:43 CEST | Update | - |
| article html file updated | 4 May 2019 13:53 CEST | Update | - |
| article html file updated | 7 February 2017 04:36 CET | Update | - |
| article html file updated | 23 January 2017 11:56 CET | Original file | - |
| article xml uploaded. | 23 January 2017 11:55 CET | Original file | https://www.mdpi.com/2073-4441/9/1/69/xml |
| article pdf uploaded. | 23 January 2017 11:55 CET | Version of Record | https://www.mdpi.com/2073-4441/9/1/69/pdf |
