| article html file updated | 9 February 2020 00:15 CET | Update | https://www.mdpi.com/2075-1680/6/4/34 |
| article html file updated | 29 September 2019 06:18 CEST | Update | N/A |
| article html file updated | 2 May 2019 08:11 CEST | Update | N/A |
| article html file updated | 18 April 2019 05:58 CEST | Update | N/A |
| article html file updated | 2 January 2018 13:23 CET | Update | N/A |
| article html file updated | 18 December 2017 11:20 CET | Original file | N/A |
| article xml uploaded. | 18 December 2017 11:19 CET | Original file | https://www.mdpi.com/2075-1680/6/4/34/xml |
| article pdf uploaded. | 18 December 2017 11:19 CET | Updated version of record | https://www.mdpi.com/2075-1680/6/4/34/pdf |
| article pdf uploaded. | 15 December 2017 15:16 CET | Version of Record | https://www.mdpi.com/2075-1680/6/4/34/pdf-vor |
