| article html file updated | 5 February 2020 09:53 CET | Update | https://www.mdpi.com/1422-0067/9/1/89 |
| article html file updated | 9 May 2019 16:13 CEST | Update | - |
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| article html file updated | 14 August 2014 12:05 CEST | Update | - |
| article xml file uploaded | 14 August 2014 12:05 CEST | Original file | https://www.mdpi.com/1422-0067/9/1/89/xml |
| article html file updated | 6 February 2013 13:42 CET | Update | - |
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| article html file updated | 18 January 2013 18:43 CET | Update | - |
| article html file updated | 17 January 2013 17:30 CET | Original file | - |
