| article html file updated | 6 February 2020 01:34 CET | Update | https://www.mdpi.com/1422-0067/14/4/8491 |
| article html file updated | 8 May 2019 06:10 CEST | Update | - |
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| article html file updated | 6 May 2013 18:28 CEST | Original file | - |
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| article pdf uploaded. | 17 April 2013 11:21 CEST | Version of Record | https://www.mdpi.com/1422-0067/14/4/8491/pdf |