| article html file updated | 6 February 2020 13:30 CET | Update | https://www.mdpi.com/2079-7737/3/4/724 |
| article html file updated | 7 May 2019 05:47 CEST | Update | - |
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| article html file updated | 21 August 2015 01:37 CEST | Update | - |
| article html file updated | 31 December 2014 10:30 CET | Original file | - |
| article xml file uploaded | 31 December 2014 10:30 CET | Original file | https://www.mdpi.com/2079-7737/3/4/724/xml |
| article pdf uploaded. | 10 November 2014 12:54 CET | Version of Record | https://www.mdpi.com/2079-7737/3/4/724/pdf |
