| article html file updated | 5 February 2020 17:33 CET | Update | https://www.mdpi.com/2079-9268/1/2/247 |
| article html file updated | 9 May 2019 00:15 CEST | Update | - |
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| article html file updated | 16 June 2015 16:55 CEST | Update | - |
| article html file updated | 14 August 2014 12:06 CEST | Update | - |
| article xml file uploaded | 14 August 2014 12:06 CEST | Original file | https://www.mdpi.com/2079-9268/1/2/247/xml |
| article html file updated | 6 February 2013 21:35 CET | Update | - |
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| article html file updated | 28 January 2013 22:51 CET | Update | - |
| article html file updated | 26 January 2013 03:17 CET | Update | - |
| article html file updated | 22 January 2013 18:13 CET | Original file | - |
