| article html file updated | 29 August 2025 20:53 CEST | Update | https://www.mdpi.com/2076-3921/2/4/398 |
| article html file updated | 15 July 2022 22:44 CEST | Update | N/A |
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| article html file updated | 19 August 2015 13:14 CEST | Original file | N/A |
| article pdf uploaded. | 10 December 2013 16:12 CET | Version of Record | https://www.mdpi.com/2076-3921/2/4/398/pdf |
