| article html file updated | 6 February 2020 09:19 CET | Update | https://www.mdpi.com/2075-1729/4/2/225 |
| article html file updated | 20 September 2019 08:24 CEST | Update | - |
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| article html file updated | 21 March 2019 17:12 CET | Update | - |
| article html file updated | 20 August 2015 07:20 CEST | Update | - |
| article html file updated | 26 August 2014 04:22 CEST | Original file | - |
| article xml file uploaded | 26 August 2014 04:22 CEST | Original file | https://www.mdpi.com/2075-1729/4/2/225/xml |
| article pdf uploaded. | 16 May 2014 15:33 CEST | Version of Record | https://www.mdpi.com/2075-1729/4/2/225/pdf |
