| article html file updated | 5 February 2020 15:24 CET | Update | https://www.mdpi.com/1424-8247/3/9/2956 |
| article html file updated | 19 September 2019 00:52 CEST | Update | N/A |
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| article html file updated | 5 June 2014 09:42 CEST | Original file | N/A |
| article xml file uploaded | 5 June 2014 09:42 CEST | Original file | https://www.mdpi.com/1424-8247/3/9/2956/xml |
