| article html file updated | 29 August 2025 20:38 CEST | Update | https://www.mdpi.com/1996-1073/6/5/2521 |
| article html file updated | 15 July 2022 22:17 CEST | Update | N/A |
| article html file updated | 6 February 2020 02:07 CET | Update | N/A |
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| article html file updated | 13 February 2017 02:30 CET | Original file | N/A |
| article pdf uploaded. | 17 May 2013 17:27 CEST | Updated version of record | https://www.mdpi.com/1996-1073/6/5/2521/pdf |
| article pdf uploaded. | 16 May 2013 14:14 CEST | Version of Record | https://www.mdpi.com/1996-1073/6/5/2521/pdf-vor |
