| article html file updated | 13 August 2026 16:47 CEST | Update | https://www.mdpi.com/1996-1073/8/4/2337 |
| article html file updated | 6 February 2020 16:57 CET | Update | N/A |
| article html file updated | 6 May 2019 23:10 CEST | Update | N/A |
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| article html file updated | 21 August 2015 09:16 CEST | Original file | N/A |
| article pdf uploaded. | 25 March 2015 10:14 CET | Version of Record | https://www.mdpi.com/1996-1073/8/4/2337/pdf |
