| article html file updated | 5 February 2020 14:02 CET | Update | https://www.mdpi.com/1424-8247/3/4/961 |
| article html file updated | 9 May 2019 07:25 CEST | Update | - |
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| article html file updated | 16 June 2015 08:57 CEST | Update | - |
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| article xml file uploaded | 14 August 2014 12:04 CEST | Update | https://www.mdpi.com/1424-8247/3/4/961/xml |
| article html file updated | 5 June 2014 08:51 CEST | Update | - |
| article xml file uploaded | 5 June 2014 08:51 CEST | Original file | - |
| article html file updated | 6 February 2013 17:01 CET | Update | - |
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| article html file updated | 21 January 2013 22:10 CET | Update | - |
| article html file updated | 18 January 2013 04:13 CET | Original file | - |
