| article html file updated | 5 February 2020 10:16 CET | Update | https://www.mdpi.com/1424-8220/4/11/181 |
| article html file updated | 9 May 2019 15:32 CEST | Update | N/A |
| article html file updated | 22 March 2019 07:41 CET | Update | N/A |
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| article html file updated | 5 May 2014 08:10 CEST | Original file | N/A |
| article xml file uploaded | 5 May 2014 08:09 CEST | Original file | https://www.mdpi.com/1424-8220/4/11/181/xml |
