| article html file updated | 13 August 2026 13:22 CEST | Update | https://www.mdpi.com/2071-1050/7/2/1840 |
| article html file updated | 6 February 2020 15:50 CET | Update | N/A |
| article html file updated | 7 May 2019 01:12 CEST | Update | N/A |
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| article html file updated | 21 August 2015 07:20 CEST | Original file | N/A |
| article pdf uploaded. | 10 February 2015 10:29 CET | Version of Record | https://www.mdpi.com/2071-1050/7/2/1840/pdf |
