| article html file updated | 29 August 2025 22:30 CEST | Update | https://www.mdpi.com/2227-7099/3/4/237 |
| article html file updated | 16 July 2022 01:29 CEST | Update | - |
| article html file updated | 7 February 2020 02:30 CET | Original file | - |
| article pdf uploaded. | 21 December 2015 14:30 CET | Version of Record | https://www.mdpi.com/2227-7099/3/4/237/pdf |
