| article html file updated | 8 February 2020 03:26 CET | Update | https://www.mdpi.com/2076-0787/6/2/22 |
| article html file updated | 4 May 2019 02:29 CEST | Update | - |
| article html file updated | 13 April 2017 08:27 CEST | Original file | - |
| article xml uploaded. | 13 April 2017 08:25 CEST | Original file | https://www.mdpi.com/2076-0787/6/2/22/xml |
| article pdf uploaded. | 13 April 2017 08:25 CEST | Updated version of record | https://www.mdpi.com/2076-0787/6/2/22/pdf |
| article pdf uploaded. | 12 April 2017 12:26 CEST | Version of Record | https://www.mdpi.com/2076-0787/6/2/22/pdf-vor |
