| article html file updated | 5 February 2020 21:50 CET | Update | https://www.mdpi.com/2076-3417/2/3/669 |
| article html file updated | 8 May 2019 15:05 CEST | Update | - |
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| article html file updated | 14 August 2014 11:40 CEST | Update | - |
| article xml file uploaded | 14 August 2014 11:40 CEST | Update | https://www.mdpi.com/2076-3417/2/3/669/xml |
| article html file updated | 14 August 2014 11:20 CEST | Update | - |
| article xml file uploaded | 14 August 2014 11:20 CEST | Original file | - |
| article html file updated | 7 February 2013 14:48 CET | Update | - |
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| article html file updated | 6 February 2013 10:07 CET | Update | - |
| article html file updated | 29 January 2013 06:23 CET | Update | - |
| article html file updated | 24 January 2013 01:23 CET | Original file | - |
