| article html file updated | 29 August 2025 20:39 CEST | Update | https://www.mdpi.com/2076-0787/2/2/209 |
| article html file updated | 15 July 2022 22:18 CEST | Update | N/A |
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| article html file updated | 20 March 2019 22:47 CET | Original file | N/A |
| article pdf uploaded. | 22 May 2013 17:50 CEST | Updated version of record | https://www.mdpi.com/2076-0787/2/2/209/pdf |
| article pdf uploaded. | 21 May 2013 17:42 CEST | Version of Record | https://www.mdpi.com/2076-0787/2/2/209/pdf-vor |
