| article html file updated | 6 February 2020 04:20 CET | Update | https://www.mdpi.com/1422-0067/14/9/18809 |
| article html file updated | 8 May 2019 00:33 CEST | Update | N/A |
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| article xml file uploaded | 14 August 2014 12:06 CEST | Update | https://www.mdpi.com/1422-0067/14/9/18809/xml |
| article html file updated | 31 October 2013 10:23 CET | Update | N/A |
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| article html file updated | 14 October 2013 12:57 CEST | Original file | N/A |
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| article pdf uploaded. | 12 September 2013 12:15 CEST | Version of Record | https://www.mdpi.com/1422-0067/14/9/18809/pdf |