| article html file updated | 6 February 2020 04:58 CET | Update | https://www.mdpi.com/2073-4468/2/4/535 |
| article html file updated | 7 May 2019 23:10 CEST | Update | - |
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| article html file updated | 17 June 2015 13:59 CEST | Update | - |
| article html file updated | 27 November 2014 04:17 CET | Original file | - |
| article xml file uploaded | 27 November 2014 04:17 CET | Original file | https://www.mdpi.com/2073-4468/2/4/535/xml |
| article pdf uploaded. | 17 October 2013 16:31 CEST | Version of Record | https://www.mdpi.com/2073-4468/2/4/535/pdf |
