| article html file updated | 29 August 2025 20:49 CEST | Update | https://www.mdpi.com/2076-3921/2/4/293 |
| article html file updated | 15 July 2022 22:39 CEST | Update | N/A |
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| article html file updated | 17 June 2015 14:21 CEST | Original file | N/A |
| article pdf uploaded. | 31 October 2013 15:07 CET | Updated version of record | https://www.mdpi.com/2076-3921/2/4/293/pdf |
| article pdf uploaded. | 29 October 2013 10:21 CET | Version of Record | https://www.mdpi.com/2076-3921/2/4/293/pdf-vor |
