| article html file updated | 5 February 2020 15:08 CET | Update | https://www.mdpi.com/1422-0067/11/8/2821 |
| article html file updated | 9 May 2019 05:05 CEST | Update | - |
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| article html file updated | 16 June 2015 11:03 CEST | Update | - |
| 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/1422-0067/11/8/2821/xml |
| article html file updated | 6 February 2013 18:16 CET | Update | - |
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| article html file updated | 22 January 2013 02:34 CET | Update | - |
| article html file updated | 18 January 2013 08:35 CET | Original file | - |
