| article html file updated | 8 February 2020 18:34 CET | Update | https://www.mdpi.com/2076-0787/6/4/77 |
| article html file updated | 2 May 2019 21:01 CEST | Update | - |
| article html file updated | 18 October 2017 05:42 CEST | Original file | - |
| article xml uploaded. | 18 October 2017 05:40 CEST | Original file | https://www.mdpi.com/2076-0787/6/4/77/xml |
| article pdf uploaded. | 18 October 2017 05:40 CEST | Updated version of record | https://www.mdpi.com/2076-0787/6/4/77/pdf |
| article pdf uploaded. | 16 October 2017 12:01 CEST | Version of Record | https://www.mdpi.com/2076-0787/6/4/77/pdf-vor |
