| article html file updated | 30 August 2025 01:44 CEST | Update | https://www.mdpi.com/2227-9040/5/4/30 |
| article html file updated | 16 July 2022 07:29 CEST | Update | - |
| article html file updated | 8 February 2020 21:38 CET | Update | - |
| article html file updated | 28 September 2019 14:22 CEST | Update | - |
| article html file updated | 2 May 2019 14:00 CEST | Update | - |
| article html file updated | 18 April 2019 11:40 CEST | Update | - |
| article html file updated | 2 January 2018 13:35 CET | Update | - |
| article html file updated | 19 November 2017 10:33 CET | Original file | - |
| article xml uploaded. | 19 November 2017 10:31 CET | Original file | https://www.mdpi.com/2227-9040/5/4/30/xml |
| article pdf uploaded. | 19 November 2017 10:31 CET | Version of Record | https://www.mdpi.com/2227-9040/5/4/30/pdf |