| article html file updated | 29 August 2025 21:04 CEST | Update | https://www.mdpi.com/2076-3387/4/2/137 |
| article html file updated | 15 July 2022 23:04 CEST | Update | N/A |
| article html file updated | 6 February 2020 09:30 CET | Update | N/A |
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| article html file updated | 20 August 2015 08:18 CEST | Original file | N/A |
| article pdf uploaded. | 26 May 2014 15:08 CEST | Version of Record | https://www.mdpi.com/2076-3387/4/2/137/pdf |
