| article html file updated | 6 February 2020 04:01 CET | Update | https://www.mdpi.com/1422-0067/14/9/17536 |
| article html file updated | 8 May 2019 01:13 CEST | Update | N/A |
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| article html file updated | 14 October 2013 12:23 CEST | Original file | N/A |
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| article pdf uploaded. | 27 August 2013 14:28 CEST | Version of Record | https://www.mdpi.com/1422-0067/14/9/17536/pdf |