| article html file updated | 13 August 2026 17:23 CEST | Update | https://www.mdpi.com/1996-1073/8/4/2647 |
| article html file updated | 6 February 2020 17:14 CET | Update | N/A |
| article html file updated | 6 May 2019 22:42 CEST | Update | N/A |
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| article html file updated | 21 August 2015 09:49 CEST | Original file | N/A |
| article pdf uploaded. | 1 April 2015 16:25 CEST | Version of Record | https://www.mdpi.com/1996-1073/8/4/2647/pdf |
