| article html file updated | 8 February 2020 20:05 CET | Update | https://www.mdpi.com/2076-0787/6/4/82 |
| article html file updated | 2 May 2019 17:31 CEST | Update | N/A |
| article html file updated | 2 November 2017 10:49 CET | Original file | N/A |
| article xml uploaded. | 2 November 2017 10:48 CET | Original file | https://www.mdpi.com/2076-0787/6/4/82/xml |
| article pdf uploaded. | 2 November 2017 10:48 CET | Updated version of record | https://www.mdpi.com/2076-0787/6/4/82/pdf |
| article pdf uploaded. | 1 November 2017 13:08 CET | Version of Record | https://www.mdpi.com/2076-0787/6/4/82/pdf-vor |
