| article html file updated | 29 August 2025 23:54 CEST | Update | https://www.mdpi.com/2075-4418/6/4/40 |
| article html file updated | 20 August 2025 22:25 CEST | Update | - |
| article html file updated | 16 July 2022 03:52 CEST | Update | - |
| article html file updated | 7 February 2020 18:04 CET | Update | - |
| article html file updated | 22 September 2019 05:44 CEST | Update | - |
| article html file updated | 4 May 2019 22:25 CEST | Update | - |
| article html file updated | 28 December 2016 11:46 CET | Update | - |
| article html file updated | 16 November 2016 09:18 CET | Original file | - |
| article xml uploaded. | 16 November 2016 09:16 CET | Original file | https://www.mdpi.com/2075-4418/6/4/40/xml |
| article pdf uploaded. | 16 November 2016 09:16 CET | Version of Record | https://www.mdpi.com/2075-4418/6/4/40/pdf |
