| article html file updated | 29 August 2025 21:29 CEST | Update | https://www.mdpi.com/2227-9059/3/1/71 |
| article html file updated | 15 July 2022 23:47 CEST | Update | - |
| article html file updated | 6 February 2020 15:24 CET | Update | - |
| article html file updated | 7 May 2019 02:03 CEST | Update | - |
| article html file updated | 25 March 2019 20:52 CET | Update | - |
| article html file updated | 23 February 2017 02:24 CET | Update | - |
| article html file updated | 21 August 2015 06:19 CEST | Original file | - |
| article pdf uploaded. | 22 January 2015 14:28 CET | Version of Record | https://www.mdpi.com/2227-9059/3/1/71/pdf |
