| article html file updated | 8 February 2020 20:57 CET | Update | https://www.mdpi.com/2076-0787/6/4/89 |
| article html file updated | 2 May 2019 15:31 CEST | Update | - |
| article html file updated | 11 November 2017 12:19 CET | Original file | - |
| article xml uploaded. | 11 November 2017 12:18 CET | Update | https://www.mdpi.com/2076-0787/6/4/89/xml |
| article xml uploaded. | 11 November 2017 12:18 CET | Update | - |
| article xml uploaded. | 11 November 2017 12:18 CET | Original file | - |
| article pdf uploaded. | 11 November 2017 12:18 CET | Version of Record | https://www.mdpi.com/2076-0787/6/4/89/pdf |
