| article html file updated | 9 February 2020 00:12 CET | Update | https://www.mdpi.com/2075-4426/7/4/21 |
| article html file updated | 29 September 2019 05:57 CEST | Update | - |
| article html file updated | 2 May 2019 08:18 CEST | Update | - |
| article html file updated | 18 April 2019 06:05 CEST | Update | - |
| article html file updated | 2 January 2018 20:35 CET | Update | - |
| article html file updated | 22 December 2017 11:18 CET | Original file | - |
| article xml uploaded. | 22 December 2017 11:17 CET | Original file | https://www.mdpi.com/2075-4426/7/4/21/xml |
| article pdf uploaded. | 22 December 2017 11:17 CET | Updated version of record | https://www.mdpi.com/2075-4426/7/4/21/pdf |
| article pdf uploaded. | 15 December 2017 12:00 CET | Version of Record | https://www.mdpi.com/2075-4426/7/4/21/pdf-vor |
