| article html file updated | 13 August 2026 12:34 CEST | Update | https://www.mdpi.com/1996-1073/8/2/1080 |
| article html file updated | 6 February 2020 15:38 CET | Update | N/A |
| article html file updated | 7 May 2019 01:36 CEST | Update | N/A |
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| article html file updated | 21 August 2015 06:52 CEST | Original file | N/A |
| article pdf uploaded. | 2 February 2015 10:52 CET | Version of Record | https://www.mdpi.com/1996-1073/8/2/1080/pdf |
