| article html file updated | 29 August 2025 20:50 CEST | Update | https://www.mdpi.com/2076-0760/2/4/270 |
| article html file updated | 15 July 2022 22:40 CEST | Update | - |
| article html file updated | 6 February 2020 05:26 CET | Update | - |
| article html file updated | 7 May 2019 22:20 CEST | Update | - |
| article html file updated | 21 March 2019 07:22 CET | Original file | - |
| article pdf uploaded. | 8 November 2013 16:35 CET | Version of Record | https://www.mdpi.com/2076-0760/2/4/270/pdf |
