| article html file updated | 13 August 2026 10:52 CEST | Update | https://www.mdpi.com/1996-1073/8/1/454 |
| article html file updated | 6 February 2020 15:08 CET | Update | N/A |
| article html file updated | 7 May 2019 02:33 CEST | Update | N/A |
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| article html file updated | 21 August 2015 05:42 CEST | Original file | N/A |
| article pdf uploaded. | 13 January 2015 14:30 CET | Version of Record | https://www.mdpi.com/1996-1073/8/1/454/pdf |
