| article html file updated | 6 February 2020 07:45 CET | Update | https://www.mdpi.com/2077-0375/4/1/143 |
| article html file updated | 7 May 2019 17:39 CEST | Update | - |
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| article html file updated | 19 August 2015 22:51 CEST | Update | - |
| article html file updated | 28 April 2014 10:55 CEST | Original file | - |
| article xml file uploaded | 28 April 2014 10:55 CEST | Original file | https://www.mdpi.com/2077-0375/4/1/143/xml |
| article pdf uploaded. | 6 March 2014 13:35 CET | Version of Record | https://www.mdpi.com/2077-0375/4/1/143/pdf |
