| article html file updated | 5 February 2020 17:30 CET | Update | https://www.mdpi.com/1424-8247/4/6/915 |
| article html file updated | 9 May 2019 00:24 CEST | Update | N/A |
| article html file updated | 20 March 2019 08:02 CET | Update | N/A |
| article html file updated | 16 June 2015 16:46 CEST | Update | N/A |
| article html file updated | 13 June 2014 12:14 CEST | Update | N/A |
| article xml file uploaded | 13 June 2014 12:14 CEST | Original file | https://www.mdpi.com/1424-8247/4/6/915/xml |
| article html file updated | 6 February 2013 21:30 CET | Update | N/A |
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| article html file updated | 28 January 2013 22:46 CET | Update | N/A |
| article html file updated | 26 January 2013 03:07 CET | Update | N/A |
| article html file updated | 22 January 2013 17:46 CET | Original file | N/A |
