| article html file updated | 6 February 2020 00:17 CET | Update | https://www.mdpi.com/2079-7737/2/1/284 |
| article html file updated | 8 May 2019 09:08 CEST | Update | N/A |
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| article html file updated | 17 June 2015 05:57 CEST | Update | N/A |
| article html file updated | 18 July 2014 03:53 CEST | Update | N/A |
| article xml file uploaded | 18 July 2014 03:52 CEST | Original file | https://www.mdpi.com/2079-7737/2/1/284/xml |
| article html file updated | 8 February 2013 09:43 CET | Original file | N/A |
| article pdf uploaded. | 29 January 2013 11:20 CET | Version of Record | https://www.mdpi.com/2079-7737/2/1/284/pdf |
